Mercedes c class heater not working. However, a bad electrical connector or broken wire, or a defect in the climate control unit can also cause the blower motor to stop working. 3. I have checked fuses and all ok. With a system this complex, it’s likely that you’ll encounter an air conditioning problem at some point during your ownership. Heres two videos of the same fix, both are helpful. Oct 21, 2022 · The heater may stop working in Mercedes-Benz A-Class due to low coolant level or air in the cooling system, clogged heater core, bad thermostat, faulty blend door actuator, bad water pump, dirty cabin air filter, bad blower motor, or HVAC control unit malfunction. Dec 29, 2015 · STAR TekInfo. No heaters, no AC, nor defrost turn on. I Purchased my c-class 2009 2. Feb 14, 2022 · The noise is a sort of hiss, that also sounds a bit like radio static or a leaky air valve. The one in my W211 heats up pretty quickly. The system will go through all of the duct operations and the light should stop after about 30 seconds. 2. #4 · Dec 21, 2016. Pop this trim piece off and set it aside. Cost me $60 for the part and 30 minutes. Push back 3 metal clips on the valve to release 3 of the pipes. The most common reasons a Mercedes-Benz S500 heater isn't working are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor. Feb 9, 2015 · The passenger side seat heater in my 2003 clk55 has stopped working, when it went out I noticed an "electrical fire" smell. Fault with the SCR system. No matter the cause, an AdBlue system that doesn’t work will not affect the engine Dec 28, 2017 · Watch as BIG STEVE steals the spotlight from Jordan to show you the workings of the Mercedes-Benz climate control system! This system is in some of our most Feb 28, 2004 · W220 S-Class Automatic Climate Control (ACC) Hidden Service Menus Brian W. If you are not sure if the switches are the problem, we recommend you get the covers off and power the motor directly with a 12 volt power source. A common problem on all models. I check the duo valve it appeared clean When the heater blows hot the separate temp controls do adjust properly. The fan stopped blowing air, lights are on and heat felt at vents when car is warm. Any idea what this could be please, and exactly how I could go about fixing if DIY is possible. 10 posts · Joined 2007. If you are starting to hear a whining sound when the motor is running or the motor doesn' Feb 9, 2022 · The most common causes for AC fan blower motor not working in Mercedes-Benz C-Class are blown fuse, bad relay, resistor or control module malfunction and faulty blower motor. Check to see if you have a hot hose past the aux pump then check to see if you have hot hoses past May 25, 2007 · And this only happens to the 2 driver side vents. For that you need the dealership to reprogram it. Oct 28, 2020 · I've got a 2012 S550 with no heat. There are many threads that complain about the seat heater. 1418 posts · Joined 2007. The AC does not work. I have a 2013 and did this same fix for no heat and it fixed it. If you have a 2012 S550, this video shows what to replace if theres not heat but your AC still blows. #1 · Aug 6, 2013. #3 · Oct 30, 2020. Whereabouts is the electric heater matrix on the Mercedes w204 as I think this may be the fault. Mar 27, 2009 · 3. Jun 21, 2011 · Kaspar7. Pull the inner headliner (2) out in the area of the rear window. Hi guys im new member n its my first post. Rice - PDF either your heat exchanger isn't working= choked heat exchanger matrix or dual valve not permitting coolant flow [ it may have a small electrical circulation assist pump also which has gone awol] OR the air diverter flaps which route the airflow thro the heat exchange matrix have jammed in the cold position blower on heater not working i have a mercedes c280 1996-1998 you turn switch for heating, you can get hot or cold - Mercedes-Benz 1998 C-Class question Nov 2, 2012 · Slk heater not blowing hot. With the ashtray open, grab ahold of the front of the other trim piece around the shifter that goes from the ashtray to the cupholder. Check / replace heater bypass valve. If the motor will just not run, many times Feb 2, 2015 · Just joined the forum having previously owned Imprezas but decided to change to a more respectable family car. Is this just finding the vacuum line under the hood and reattaching it or what. The most common reasons a 1999 Mercedes-Benz CLK320 heater isn't working are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor. Possibly the resistor block needs replacement, you should check voltage to res. I bought the 30A "fusible link" at a local dealer that carries import parts for $3. Nov 7, 2011 · try the brushes in the motor. Nov 26, 2010 · 1 post · Joined 2009. Jul 27, 2018 · 11 posts · Joined 2021. Press and hold the defrost and recirculated air buttons simultaneously to reset the climate control system. There is a short whirring noise but then nothing. Thermostat seems to be fine cuz engine temp goes upto 90 but still cold air inside. k. I move around all the fuses that internet showed that could be the AC, but did not work. #5 · Nov 29, 2014. Much cheaper than a fan. Sep 25, 2017 · C class w203 c220 cdi sport. Climate Control Fuse Location c200 c220 c250 c300 c350 Replacement Fuses: https://amzn. block, if thats o. Unscrew nut (1) on both sides. Next is the fiddly bit - unclipping the plastic retainer tabs down the side. To fix the problem, you must remove the heater control valve located in the engine bay by the firewall. Follow them to a terminal block located on the firewall near the power brake vacuum booster. I dont understand how the heater / AC system works but this makes sense to me. The most common reasons a Mercedes-Benz S550 heater isn't working are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor. In addition the recycle AC does not work either. The ECU can turn the fan on and off and adjust its speed based on cooling demands - that is, cooling of both the engine and for the A/C system. Mercedes-Benz S550. Emmm, unplug the coolant temperature sensor in front of the engine, close to the thermostat, the fan should come high and loud. When the engine is running, the only way to kill the noise is by turning the whole climate control system off. The defrost button has three lines going Dec 12, 2014 · You then remove 3 screws from the black plastic side panel - these are small TORX screws. In case of a faulty fuse, the circuit is interrupted and the motor can not work. Save Share. Check the owners manual of your A-Class or the fuse box cover to find the exact location of the fuse for the blower motor. It was the only thing that was on when it stopped working Mercedes Mechanic: sebastian manrique , Auto Mechanic replied 3 years ago Reasons a 1999 Mercedes-Benz CLK320 Heater Isn't Working. Problem is interior heater doesnt produce hot air. The fuse is typically in the firewall encased in a little plastic box. #5. As above get a decent indy to look. Nov 30, 2009 · HEATER BLOWER NOT WORKING A140 petrol auto 2001, Heater blower doesn't work at all, not even on highest setting, I've checked fuse and is ok, do you think it is the dreaded resister?? :) May 17, 2020 · Climate control panel on E350 2010 completely stopped working. Not sure what Mercedes uses to operate their doors, motors or vacuum. David Feb 9, 2022 · 1. Had similar problem. to/2qWvdrLThis video might Feb 11, 2008 · truck2807. Aug 28, 2012 · The Mercedes E-class air conditioning is a complicated system of blower motors, computers, relays, switches, and refrigeration parts. 4) Replacing blown fuses. Just had a friend to check out my 2004 / 2005 W211 (266) E320 CDI again with his Launch unit. hand side heater circuit will be low (value 3 and 4 in the sensor readout here); STAR TekInfo. MERCEDES W204 Climate Control Not Working. When removed, I could not turn the fan/motor rotor at all and I thought it would be a straight replacement job. #2 · Feb 21, 2008. I bit the bullet (after buying the part) and had it scanned just to be sure. Dec 11, 2017 · 5 posts · Joined 2015. 1. info/mercedes-benz/mercedes-benz-r-class-w251-2005-2013-fuses-and-relayFuse box diagram (location and assignment of Oct 21, 2022 · The heater may stop working in Mercedes-Benz G-Class due to low coolant level or air in the cooling system, clogged heater core, bad thermostat, faulty blend door actuator, bad water pump, dirty cabin air filter, bad blower motor, or HVAC control unit malfunction. You can now view the 4-way valve right under the brake-servo assembly. Mine also has a rip in the threads so I'm going to fix the heater and seat cover Oct 2, 2017 · Hi all. Jul 5, 2019 · And, I know the weather conditions are such that power is being sent for the mirror heaters, because the passenger side is heating up while the driver side stays cold. If the engine warms up ok, the the problem is in the heater system, most likely the circulation pump. Has nothing to do with the outside temperature. If it does, you've probably got a bad regulator from Autodoc. Also, the center vent makes a sucking noise when opened but there's no air flow. you could bypass the resistor block with jumper wires to verify if the blower is in working condition. He's a close friend but others suggest I take it to the dealer. The noise only occurs when the engine is running and can only be heard inside the car and not from the outside in the engine bay. Apr 19, 2009 · C-280 W202 AC not working. Two days ago the heater stopped working although the control panel still lights up and the rear demister are working but no air comes out the vents. Conduct fuse testing to find blown fuses. The most common reasons a Mercedes-Benz C230 heater isn't working are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor. Cover all the cable connectors with a lage towel. Check its switched on on the instrument cluster settings. When I got the car, the climate control didn't work. Check the owners manual of your B-Class or the fuse box cover to find the exact location of the fuse for the blower motor. 29K views 3 years ago. #4 · Dec 17, 2008. The most common reasons a Mercedes-Benz C350 heater isn't working are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor. It does not work on any of the five settings, I have read it may be the resistor if it was still working on the highest setting but ours does not. w212 Blower fuse chart and help. May 3, 2016 · Problem is noted when heat fails to deliver on cold days/morning/evening when requested by the driver/passenger. 255 posts · Joined 2011. Found the fuse on the battery pillar to be failed. 50. must also operate. May 10, 2021 · We have a 2006 W169 A Class Mercedes and the heater fan has stopped working. If the fuse is blown, replace it with a new one with Feb 22, 2020 · How To Repair Climate Control Buttons On A Mercedes C-ClassIn this video I show step by step how to get the fan control buttons to work again. you will have to change Dec 20, 2016 · 1679 posts · Joined 2014. All functions of heater appear to be working but no hot air comes out and when going through thecomputer settings heater does not appear. I have mercedes c class 2006 c220 cdi sport. Jun 30, 2019 · Heater blower not working. One should have +12V. Usually the tappets in the duovalve bind up or one or both of the coils dies. One should be ground/earth. One person who had this issue, said they separated the Dec 25, 2018 · Dec 25, 2018. Not able to turn on any features of the control, lights do not come on. Hello all. Nov 23, 2008 · Unplug the connectors from it and remove the shifter knob with it. Jan 6, 2009 · Check this first. Took it to mechanic and he said the compressor won't kick in but doesn't know why. Apr 16, 2011 · 2003 e class 270 cdi . 2) PTC Heater Booster Faulty. . The fuse is square between two cables on positive term of battery, doesn't look like a fuse at 1st glance. i need some help here. I believe yo can actually see it. The change over valve, controls how much (hot) coolant should go through the heater core. It would then be best to get codes pulled with SDS to determine specifically what is wrong. On my 2001 Mercedes-Benz C-Class (W203) the windshield washers spray water only 5 times. Jun 22, 2008 · bmeister. You may have an inop duovalve, I replaced mine recently. Hi to All and thanks in advance for your help. Check duovalve and aux valve. wireman said: On some cars the conductive traces of the heater are used as the antenna, a bit of crafty electrics allows the RF signal to pass to the radio, with a faulty (open circuit) screen heater the crafty electrics bit does not do its job and the RF is shorted to ground via the 12v supply reducing the antenna efficiency. The AC blower motor in Mercedes-Benz A-Class needs electricity to work. If your heater motor won't come on, first check your fuse or relay. Replace the fuse with a new one, and the screen should start functioning correctly. Bearing in mind this may take a good few mins of driving. Feb 9, 2022 · 1. It’s right hand drive, I’ve pulled left under dash apart and can see a metal box but no fan. #1 · Jul 23, 2015. if thats ok then the fault will be with the motor. Heater Blower Motor. 5. Based on what I have seen on other forums, the only cause then can be an issue with the heater "element" behind the glass. The car ran okay when I got it took a long time to start when cold. Question moved to Mercedes Benz C-Class. Blower working but no hot air - little or no airflow, hot or cold. Any ideas on what exactly could have burned up? I'm assuming the actual heating element? And how hard is it to replace? Sep 11, 2023 · Engine overheating in Mercedes-Benz C-Class is typically caused by a combination of factors, including insufficient coolant levels, coolant leaks from components like hoses or the radiator, a malfunctioning thermostat that fails to regulate coolant flow, a clogged radiator obstructing proper heat dissipation, faulty cooling fans not adequately cooling the radiator, and a worn or damaged water Jan 29, 2016 · The following instruction may help you to fix your climate control (my car is a 2006 R500, but similar units are installed on many other models). 7) Assembled and re filled system with a bottle of Nulon Extreme Flush. Jan 10, 2019 · See more on our website: https://fuse-box. Jan 26, 2022 · You may be able to feel around under the dash for warm spots that would indicate the heat is there, it just can't get out. The dual valve has also been checked and it seems to be working fine. If the vent is closed with the rotary knob the sucking noise is gone. Low refrigerant can cause this due to the dual-zone system's valve Feb 21, 2008 · 1418 posts · Joined 2007. Feb 23, 2024 · Are your Mercedes-Benz vehicles (E-Class W211 and CLS-Class W218) stopped blowing hot or warm air even when the climate control settings are set to maximum heat? A defective Mercedes heater control valve often causes this problem. Feb 1, 2019 · Heating Not Working. Replaced and all worked. Blown fuse. in Chicago! Today I replaced the heater valve under the hood as per recommendations here but still no heat. Sep 25, 2017. Disconnect the heated window coupling (6) 4. Daff9272, Alex 3, slk55amgbob and 1 other person. The two most common AdBlue problems are: DEF fluid low level. Heater been blowing cool air intermittently on my W211 270CD1 for a few months. Everything works fine then sometimes I just get cool air even on highest settings. Thermostat and Valve issues with heater Dec 7, 2009 · Look at where the wiring comes out of the top of the box where the blower motor is located. This requires Mercedes-Benz C350. Remove the wiper assembly. As a non-mechanic, my first impression was a dead fuse. 0 %. Switch for heated seats would illuminate then flash but seats not working. This is as far as the ignition cylinder will go without cranking the engine and starting the AC system. Less common causes are clogged expansion valve or orifice tube, overcharged oil, faulty Mercedes-Benz GLK350. Do also remember, that in addition to the duo valve, the circulation pump. I did ask for a 2nd opinion and the workshop suspected A/C or heater flap failure. So I'm turning the fan dial in my cabin to turn the heating on and there's no hot air coming from the vents. The voltage on the pink/white wire should vary from 0-6 volts as you turn the fan from low to high. #1. Oct 21, 2022 · The heater may stop working in Mercedes-Benz B-Class due to low coolant level or air in the cooling system, clogged heater core, bad thermostat, faulty blend door actuator, bad water pump, dirty cabin air filter, bad blower motor, or HVAC control unit malfunction. Its mounted on or near the firewall. The most common reasons a Mercedes-Benz E350 heater isn't working are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor. Make sure your coolant is under 2years old or replace with 50/50 solution. Hi. If they stop, and the problem is not corrected, then have the A/C refrigerant checked. Try sitting in the passenger seat, it probably heats up quicker. Looking at it (as an engineer) I thought that the dealer price for its replacement wasn't value for money. The most common reasons a Mercedes-Benz GLK350 heater isn't working are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor. They come out on the left/driver's side. Mercedes-Benz S500. 31 % of the time it's the. The AC blower motor in Mercedes-Benz S-Class needs electricity to work. MikeJ65. It doesn't blow cold. check Pollen filter not clogged, replace or remove filter if necessary. This has just happened but do not know if the heater section was there before or not. I want to share my experiance how i fixed problem with my heater in the 05 reg w203 merc. You could hear that the heater valve was working and that the compressor fan was kicking on with AC buttons, but no air would blow out of the vents. be/ObjygUhAnDUTactrix Openport 2,0 ECU - http://ali Dec 21, 2019 · That part is readily available, less than $50. There does not appear to be a reason. You have an issue no one else has ever encountered. If the duo valve is faulty, then the reading of the temp of the left and/or right. 24 % of the time it's the. #3 · Dec 14, 2021. In addition, the rear window heating takes quite long to clear the glass in the back and the demister button lights up when I press is but doesn't clear the fog from the front or side windows. Oct 28, 2020 · 344 posts · Joined 2020. The symptoms described are possibly a couple of things - leaking head gasket is one possibility (especially given the water loss - heater failure is a common symptom in conjunction with water loss) or it could be the electric auxiliary water pump if you have one fitted (a STAR diagnostic Dec 15, 2011 · The heater blower motor on my W220 S320 CDI stopped working so I removed it with a view to replacing it. Further digging about within the system using the Launch is showing:-. Remove the battery and battery tray. I was convinced that was my issue, but on the W222 you really cant see it before you dive in. Subscribed. Dec 28, 2018 · Troubleshooting and showing how to erase Error codes on AC Control Panel Unit and get the air blowing again on your Mercedes W220 S-Class (S350, S430, S500, Jul 15, 2018 · There is a controller on the fan assembly that gets signals from the ECU. If the fuse is blown, replace it with a new one with Nov 8, 2009 · Heater fan flat fuse. (set all of this in the passenger seat so you won't misplace anything). The center vents stop working a few weeks ago when I had some work done under the hood. Turn the ignition key to the 2 position. So letme explain the issue. No resistance, no blockage. 1) Cutoff because under volts Term 30 = Yes. Low coolant or air in the cooling system. Feb 25, 2010 · Hello. 96K subscribers. #5 · Aug 14, 2022. I'm looking at buying a 1995 C220. Feb 17, 2020 · The blower motor and resistor move the air through the HVAC system. 1999 Mercedes-Benz CLK320. Problem was with heater only blowing very cold or very hot air and auto climate control would not work too. Check the owners manual of your S-Class or the fuse box cover to find the exact location of the fuse for the blower motor. check to make sure that power is going to the fan motor, simply connect a light blub with two wires to the connection to the fan ,lights up if power there. Question edited for clarity. The Body Control Module is probably controlling that. From searching the forum it would appear to be the changeover valve (also called duovalve or Feb 23, 2024 · 6) inserted hose into engine block rear heater outlet and flushed it. Found problem by messing about with heater when drivers door was opened and it worked,but Mercedes-Benz C320. Aug 8, 2023 · Here’s how to do a Mercedes climate control reset. Dec 23, 2016 · How to Activate SDFlash DAS Offline Programming MB DAS Xentry All Versions / SDFlash 2024 - https://youtu. Options for repairing it yourself and saving big $$$. 4. Feb 26, 2010 · Feb 26, 2010. Blower working but no hot air - good airflow cold but not hot. hi there my mates vito did the same thing a few weeks ago. #2 · Feb 17, 2008. You can use the other side of the seat as a guide (seat bases are interchangable); look for where the holes are to work out where the plastic clips are. Jan 28, 2013 · If the indicator lights don't stop blinking after 20-30 seconds, you have a damper linkage problem. Oct 21, 2022 · The heater may stop working in Mercedes-Benz E-Class due to low coolant level or air in the cooling system, clogged heater core, bad thermostat, faulty blend door actuator, bad water pump, dirty cabin air filter, bad blower motor, or HVAC control unit malfunction. I noticed the heater valve has an electrical connection so I assume there's a relay or fuse somewhere that powers the valve. 8) ran the engine for 45minutes exactly 10) repeated all the draining, flushing etc 11) Re-filled with new coolanr. Another possible issue is the valve itself isn't opening and letting the hot coolant get to the heater core in the first place. Forgot to mention, I have also noticed a bit of a burning smell. Locate your fuse boxes, and become current with fuse sizes as well as color codes. Aug 6, 2013 · MrPid Discussion starter. That was for my W123, 1987 300E. The AC comes out of the sides and the windshield side of the dash. We have a current and stored fault (9470 R22/3) Heater Booster. Jan 4, 2010 · Without codes, I guess that an MB tech might investigate the electrical connections to the rear windscreen heater as follows: [you do not have to remove the glass] 1. Seems to have packed in completely now as I can't get hot air at all. It's a good idea to get a replacement fuse, in case the fan circuit draws too much current and burs out one or more fans. Also put in another auxillary pump. Remove the housing for the 3 control modules, taking care not to snap any cables. While there are ways to reset Mercedes limited start condition (eBay link), finding the root of the problem and fixing an AdBlue system that is not working is important. Feb 23, 2024 · 6) inserted hose into engine block rear heater outlet and flushed it. E. 5) Repairing physical damage to the screen. Typically it will blow but not completely melt away where it will still let juice flow for the fan to work intermittently then one day it will have enough and the gap would be too wide. If the screen is still not working, check the car's fuse box to see if the fuse for the screen has blown. The AC blower motor in Mercedes-Benz B-Class needs electricity to work. The passenger side does not blow hot air at all. Would this be a difficult repair Dec 21, 2019 · That part is readily available, less than $50. Jan 13, 2016 · Jan 14, 2016. Mercedes-Benz E350. 101. Jun 17, 2015 · Mercedes-Benz C-Class: Fuse Diagrams and Commonly Blown Fuses. I have checked the fuse and that is OK. Really don't know what to do, don't want to hurt our friendship and so far he hasn't charged me anything for 4 hours work. My AC doesn't work and summer is finally here. I have searched the forum have read many posts about people having issues with air not blowing cold my issues is the air blows hot and then cold then super hot. If the engine is not warming up then the fault could be a suck thermostat or none functioning heater booster. #1 · Dec 11, 2017. Hello, I have recently encountered problem with blower and as I live in Norway it is really frustrating to know that my car is preatty much useless when this is not working. One of my friend told me it could be a matrix problem The most common reasons a 2020 Mercedes-Benz C300 heater isn't working are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor. Gain the capacity to replace your fuses, and the potential to insulate yourself from shocking repair bills. Oct 9, 2011 · Oct 9, 2011. If the fuse is blown, replace it with a new one with Mar 2, 2023 · If you find any loose wires, carefully reconnect them. Sep 3, 2018 · My SLK I bought recently, have just found out the heaters/blowers are not working. . I have the same issue C240 2002, where it works and then stops. #11 · Dec 28, 2010. I did remove the fuses for the Blower Motor, but I have still an issue with Jul 23, 2015 · 19 posts · Joined 2015. Apr 1, 2018 · Blower Motor Not Working - Fuse is okay. If the fuse is blown, replace it with a new one with Mercedes-Benz C230. Operator selects heat but gets whatever temperature air is outside. I have also noticed an issue with the ignition, where I need to turn the key a few times before the car starts! I am not sure if the Blower Motor is causing it. 235 posts · Joined 2013. 2 CDI Sport at the tail end of 2013. B. info/mercedes-benz/mercedes-benz-r-class-w251-2005-2013-fuses-and-relayFuse box diagram (location and assignment of Dec 14, 2021 · 8493 posts · Joined 2010. (a little coolant fuid will leak, hence the need to cover the cable Jan 13, 2016 · Try the reset/resync process - with the engine running, simultaneously press and hold the FRONT DEFOG and RECIRC buttons until their indicator lights begin to blink. Heater fan--not working I had a this happen to my 1998 C-Class, whilst it could be fuses/connections, (not likely) - Mercedes-Benz 1996 C-Class question Search Fixya Press enter to search. The most common reasons a Mercedes-Benz C320 heater isn't working are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor. Mercedes C320 C240 C230 C350 E class not blowing hot air W211 W219 W203 Heater Easy FIX. This article will help you understand the fuses in Sep 16, 2022 · The most common causes for AC not cooling properly in Mercedes-Benz C-Class are low or overcharged refrigerant, compressor malfunction, clogged cabin air filter, dirty condenser or evaporator coils, dirty or sluggish blower motor, and bad fuse or relay. cr tk fd gd jr yk fr cy oi kc