2007 pontiac torrent no heat - AC Auto Repair Help Forum


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2007 pontiac torrent no heat

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Auto Repair Home>> Automotive Repair>> AC Auto Repair Help Forum

bhause53
New User

Nov 9, 2012, 10:55 PM

Post #1 of 3 (12543 views)

2007 pontiac torrent no heat	Sign In

changed thermostat still has cold air coming out no hot air

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Nov 10, 2012, 4:11 AM

Post #2 of 3 (12500 views)

Re: 2007 pontiac torrent no heat	Sign In

With the engine at full operating temp, locate the 2 heater hoses where they go into the firewall and feel them to see if they are both hot to the touch. If not too hot to hold, then you have to look at the actual engine temp and if that is up, if it is, then your looking at a restricted heater core.
If you find that they are both too hot to hold, then the heat in that vehicle is controlled by a blend door that regulates heated air flow. it is operated by an electric motor/actuator. The problem can be that the actuator is stripped or inoperative or the door itself could be damaged. This is what needs to be determined by examining the actuator and see if it is responding to heat change commands or not.
If they are both not too hot to hold on to, then you either have a restricted heater core or the system is not completely full and getting air pockets for some reason.

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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Nov 10, 2012, 4:22 AM

Post #3 of 3 (12497 views)

Re: 2007 pontiac torrent no heat	Sign In

(only 3.4 engine shown for this)
What was wrong with the old thermostat? Nothing by all odds. Check that heater hoses going to core are both hot.

If engine temp is staying normal, coolant know filled and no air pockets you might have a stuck blend door or actuator problem.

It's more likely that engine has overheated, air in cooling system, is running hot, blown head gasket(s) or sealer was used that might have clogged up the heater core,

T

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