Heater not strong enough - BMW Forum - BimmerWerkz.com

3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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post #1 of 3 (permalink) Old 09-01-2012, 01:36 PM Thread Starter
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Heater not strong enough

I bought my 323is used, when it got to winter the blower motor was phenomenal. now here it is approaching the colder months again, and it does not seem to be hot enough and blowing that strong. the radiator is full, all connections are good, it works on all speeds so I know its not the resistor block. even the AC doesn't blow that strong. only on the 2 highest settings does the motor make noise,.
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post #2 of 3 (permalink) Old 09-21-2012, 09:35 PM
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I bought a 320i about months ago. similar thing was happening.

it seemed that only the passenger side was having "hot" air comming out.

i lent the car to my sister and the water pump died, she got it fixed by her mechanic and they replaced the water pump and fan, now the heater works brilliantly.

i don't know if this helps you at all but i thought it might give you some insight.

my fan only works if its turned on full, when the aircon was re-gassed the guy said that it was probably the power supply to the fan that wasn't working and said it would be cheap to replace but hard to get to so i didn't bother.
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post #3 of 3 (permalink) Old 09-21-2012, 11:59 PM
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first check if u have good coolant flow idicating the w/p like jsquare said
then chek to see if the blendoor is fuctioning properly
u will probably have to take out the glove box n such
also check to see if the cabin air filter in clogged
it is located behind the glove box deriectly behind the hvac unit control near where ur feet go
it also could be that ur heater core is clogged up
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