Question about Cars & Trucks
Heater blower stop working
With the blower turned on, try tapping the blower motor with something hard. If it restarts, then this is a failing motor. If it doesn't start, then check power to the motor. If it has power, then the motor has failed completely.
Posted on Nov 03, 2012
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Posted on Jan 02, 2017
SOURCE: 94 bmw 318iC Heater not working
1st thing to check is the coolant level. Low coolant level results in no, or little heat (not enough coolant to circulate thru the heater core). What does your engine temp gauge indicate? (or is it just a warning light?) If the car is running at what appears to be lower than normal temp., u may have a thermostat that's stuck open. This would cause the engine to not reach operating temp, and u would not have heat. Check the above 2 items 1st, then let me know what u found. If that doesn't fix it, we will continue, let's do the easy and not too expensive stuff 1st!
Posted on Nov 17, 2008
SOURCE: heater blower not working
I don't know if this is a long-term solution but I found it on another "how-to" website: on my 2001 E46 I removed the fuse (#50) for one minute. Something about the transistors inside the FSU (final stage unit, or blower resistor) resetting themselves with the constant power removed. I replaced it and drove home, which is a 1-hr drive, and the fan was on steady the whole time. Which it hasn't done in the 3 yrs I've owned it. I tested it at other speeds and it worked well. Don't know how long it will last though. If not, you need to replace the Blower Resistor - there about $75.
www.bimmerwerkz.com is an excellent source of info! They have pics, utube video, and diagrams to help you.
Posted on May 29, 2009
Hi it sounds like either the thermostat or the heater matrix, although if there is air in the system then this would also cause this fault. get the thermostat checked first as this could cause more damage if not fixed quickly.
The heater matrix or heater core may be blocked or not circulating the warm air, This is a more expensive job if it will not unblock.
Hope this helps
Posted on Jan 31, 2010
SOURCE: 2003 E39 525d Blower not working
The most common issue is the final stage (electronic resistor) but if this has been replaced its probably the fan motor. Try giving the fan motor a knock. They sometimes get stuck brushes
Posted on Jun 05, 2010
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