2002 Mercedes C240, 200K, poor heat in cold weather - Mercedes-Benz Forum
 
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#1 (permalink) Old 01-23-2013, 07:40 AM
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2002 Mercedes C240, 200K, poor heat in cold weather

2002 Mercedes C240, 200,000KM
I have the broken damper issue (ticking, no vents going to feet). Could this be realted to the problem?

Having heating issues and its damn cold out!! Takes about 20 minutes for decent heat to come not, and even then its semi warm. Please someone help.

Coolant is topped off
Coolant light is coming on on the PC, sensor error?
Engine heats up within 5-10 minutes so I assume the theromstat is OK

Other then doing a complete coolant flush, flushing out the heating core what can I do? I don't feel like paying a dealership to diagnose it...

Any thoughts? Thanks in advance.
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#2 (permalink) Old 01-23-2013, 01:16 PM
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Anyone? I'm freezing.

Could this be related to the damper issue (ticking noise)
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#3 (permalink) Old 01-23-2013, 03:35 PM
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If the coolant level is OK -- it must be a sensor

Have you done anything to the system that would have caused any air to get into it?

Obviously if the vents are not working you will not get the proper flow -- what happens when you try to manually set the air to come out of the vents with they system on HI

What system do you have -- even the basic system has some sort of a self test ..... I have a 240 and the dealer did a test on it before I purchased.
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#4 (permalink) Old 01-23-2013, 04:52 PM
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If you have damper problems, that could be the problem. Also, it could be a bad duo valve - it's electrically controlled and allows coolant to flow through the heater core. It's on the bottom heater hose - it comes through the firewall right in the center and goes into the engine block there. The valve is right at the engine with an electrical connector on it. It could be a bad electrical connector or just a bad valve.

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