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My Heater Doesn't Work - But Not What You Think!

dark.sky

By dark.sky,
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dark.sky Grand Master

dark.sky

Posted
Posted

Hey guys, just got my new daily on the road (R32 4 Door). But my heater doesn't work. Like, literally doesn't work. I took the heater door servo off and moved the arm by hand to what would be full heat. Nothing. Cold as ice. And yes the heater core is plumbed up.

Potential causes I can think of:

Heater core blocked

Massive air lock

Heater core pipes around the wrong way

I will investigate further tomorrow, but just thought I would see if anyone else has had the same thing, because its rather weird.

Manuel Kasko Grand Master

Manuel Kasko

Posted
Posted

Chances are the heater core is gone.

Check the passenger side carpet and see if its wet at all.

Have you done anything that could have caused it?

You said the hoses could be around the wrong way so have you changed them recently to cause this or it just stopped working?

dark.sky Grand Master

dark.sky

Posted
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Posted

There is no moisture in the car, that I've found.

And yeah, I have just put a new motor in, so the hoses were disconnected/re-connected.

I'm trying to remember if it worked before, but my memory is failing me.

Carbon 34 Grand Master

Carbon 34

Posted
Posted (edited)

The heater should have been burped of air , engine in heater on full hot to be sure the core was passing without air traps which fry heads

Did you back flush the system ? Should have before new engine ?

The heater mixture solenoid working on the r34 its below the master cyl , fuel filter area not sure on 32's? , yank both hoses off core by turbo dump and try a garden hose with screw type ( cheapo) sprayer , try to put heater core in hot position by hand and run water into it on low / med pressure and expect the other hole to flood out crap or if its blocked nothing will pass , reverse and try the backwards way ? Anything ?

Once done reflush system and refill heater on hot

And fan on low, drain air out of bleeds a few times

After hot and cool cycle , overflow will be sucked in a bit more then normal for a few days then settle full

If you want to flush the whole system you need to use specific hoses , let me know

Edited by Carbon 34

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