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2006 Pontiac Torrent heater blowing cold air

Coolant level fine, no leaks, top rad hose hot, bottom one cold

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Hi
check the heater hoses and if both are hot then the mode door is broken
i have replaced 2 in the torrents(not a nice job)

Posted on Jun 21, 2009

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Posted on Jan 02, 2017

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1 Answer

What would be leaking under my radiator on the drivers side?


It sounds like your thermostat is stuck closed. Your thermostat also acts as a heater valve to let hot coolant go to your heater core to blow hot air if your thermstat is stuck close it prevents your coolant to run through your radiator to cool down and to blow hot air from your heater core. A way to check to see if your thermostat is working while its at operating temp feel the bottom and top radiator hose if your lower hose is cold and top is hot your thermo is stuck closed but be careful hoses might be very hot

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Have a Peugeot 406 1.8 petrol LX on a 52 plate. Smell of coolant in the cab, no visible leak, top radiator hose hot, both hoses to heater matrix hot, bottom radiator hose cold. Air con works fine.


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My heater stoped blowing hot air.antifreeze level


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How do you do an air bleed?


With engine cool, remove rad cap, top up coolant to 1" or 2" from top in rad. Start engine & turn your heater on, (not defrost) and let it run like that until it gets up to normal operating temperature. Keep an eye on fluid level in rad, & top up as needed. Let it run, until your rad fan comes on, & off, 2 or 3 times at least. That's telling you that the thermostat has opened & hot coolant from engine has returned to rad for cooling. Every once in a while while your waiting, rev the engine slightly for a few seconds, just to assist the circulation & help bleed air out. Feel the heater now & you should feel hot air coming out. Top up rad to 1'' or 2", put cap back on, all the way, top up your return bottle to proper mark/level, and you should be good to go.

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Heater problems


Did you bleed the air oout of the cooling system - Their is a bleeding next to the therostat housing.


1 - When the vehicle is cold remove the rad(tank) cap and top up the level if needed

2 - start the vehicle with the rad cap off and leave the car run until you can see that the therostat has openned(look in tank/rad) to see fuild flow then open the bleeder slowly to let any air out of the cooling system. Once you have coolant flowing out of the bleeder close the bleeder and install the rad/tank cap.

NOTE - Be careful with the engine running and hot Coolant.

You make need to bleeding system 2-3 time to get all the all out. Once all the air is out of the system you problem should be solved. If air returns to the coolant system have the system checked for possible head gasket leaking air into the coolant system

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