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Volkswagen EuroVan: 1992-2003 (T4) engine running cold and no front heat


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Last Post: Jan 17, 2013 8:02 AM Last Post By: Indian
63bugman

Posts: 3
Registered: 01/15/13
engine running cold and no front heat
Posted: Jan 15, 2013 8:51 PM
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I recently got my 99 eurovan back from my daughter. Its been sitting up for a while and I'm having numerous small problems with it that I can't quite figure out. First of all it never warms up...the temp guage will rise but only slightly. I also have no heat to the front of the van and the center vents will not blow air at all. Are the two problems connected?

The blower fan works for the defrost and side vents but as I mentioned it's not hot? Any ideas would be helpful.
tcovenant2000

Posts: 1,802
Registered: 12/09/03
Re: engine running cold and no front heat
Posted: Jan 15, 2013 10:31 PM   in response to: 63bugman in response to: 63bugman
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Thermostat is stuck open. That's why she won't heat up and why you get only cold air from the "heater".

As for the center vents, when you turn on the blower does it always blow out the defrost port? Then you have vacuum leaks or a problem with the vacuum actuator that selects the "defrost or center or floor" setting for where the air is supposed to blow.

Thomas
swim4au

Posts: 171
Registered: 12/17/04
Re: engine running cold and no front heat
Posted: Jan 15, 2013 11:03 PM   in response to: 63bugman in response to: 63bugman
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Classic signs of the thermostat stuck open. Install a new one and your problems should go away. This is not just a comfort issue. The engine is designed to operate around 190F.

Bob W
63bugman

Posts: 3
Registered: 01/15/13
Re: engine running cold and no front heat
Posted: Jan 16, 2013 9:36 AM   in response to: tcovenant2000 in response to: tcovenant2000
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Thanks...I thought it might be a stuck thermostat. As for the center console yes it only blows out the defrost or the side vents not matter what I select. Side question whould the thermostat stuck open occationally cause me to loose coolant? The dealer checked for leaks in the system and found none but occationally I sill coolant all at once
63bugman

Posts: 3
Registered: 01/15/13
Re: engine running cold and no front heat
Posted: Jan 16, 2013 9:37 AM   in response to: swim4au in response to: swim4au
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Thanks I thought it may be but now I know.
swim4au

Posts: 171
Registered: 12/17/04
Re: engine running cold and no front heat
Posted: Jan 16, 2013 10:30 AM   in response to: 63bugman in response to: 63bugman
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The stuck thermostat is unlikely to cause loss of coolant But if it were me, I would attack one problem at a time. Replace the thermostat and then see how the system operates. While you have the sound-deadening pan off, look at the pan for signs of leakage. If you have a discoloration in the pan, the law of gravity will likely point to the source directly above.

Bob W
Indian

Posts: 222
Registered: 01/17/07
Re: engine running cold and no front heat
Posted: Jan 17, 2013 8:00 AM   in response to: swim4au in response to: swim4au
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Better open than shut. Todays thermostats are designed to stay open in case of failure. I now hade a TDI Multivan diesel and today i had a Eberspächer parking heater installed.....it heats the engine up to 90 degrees celsius within 25 minutes with an outside temperature of -10 degrees.

Edited by: Indian on Jan 17, 2013 8:00 AM

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