No Heat

I have a 2001 Volkswgen Passat V6 glx

This car has been in two dealerships.

The 1st dealer ship said that I had a clogged heater core.

They supposedly replaced it. Result No Heat.

Then they replaced the thermostat. Result No heat.

then they replaced the water pump. Result No heat.

Then they reassembled my dashboard and charged me 1100.00 and sent me on with my original problem No heat.

I go to the 2nd dealership with problem NO HEAT

They have disassembled my dashboard installed a new heater core. Told me that the one they replaced was clogged. Reassembled my dashboard. Result NO HEAT.

My car has been in these two dealerships. For 7 weeks. Result No Heat. Help.

Jim P
Do you
have the same problem?
Thursday, November 23rd, 2006 AT 3:20 PM

1 Reply

I would have given the first one no money. But, never mind that. It sounds to me like the thermostat is not opening.
Now I am using past knowledge from VW Rabbits but VW has remained consistant in many part in many vehicles so it is unlikely that there is alot of difference.
So, if you got a bit of time and some tools and some idea what is going on. First way is gonna be the most simplest and should fix it. Drain the rad. Keeping the fluid. Now refill the rad FIRST by pulling off the top rad hose that goes to the engine and pour the fluid in there until no more goes in. There will be air coming out but that is what we want - all the air out. Now the one side of the thermostat is under fluid.
Now add fluid down the rad filler neck until it is full, and put the excess in the overflow container.
Once all that is done. Start the car and let it warm up and open the heater valve. Which by the way you can see in the engine compartment on the heater hose is a plastic shutter with a wire cable attached to it. Move the controls one way and the shutter shuts off the flow to the heater core, move it the other and the shutter allows the hot fluid from the engine in. If that works visibly there is no reason to think that there is a problem there. If never sure if open or closed, go half way.
You should now get heat.

If not. Perhaps the thermostat is the problem and is not opening. (But then the engine should be overheating.)
At this point you would have to let the car cool again and remove the thermostat and put nothing back. Everything will still work without a thermostat. The difference is the car takes longer to warm up as the engine must heat all the fluid(in the engine and in the rad) instead of blocks of it. But with the thermostat gone, that is not the problem. There is nothing else. Blocked rad my butt. Then the rad would be blocked as well.
Was this
Monday, December 11th, 2006 AT 5:14 PM

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