Question about Pontiac Grand Am

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My 2000 pontiac gran am can not get any heat keeps blowing cold, where is the heater valve located

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Valve is on the passenger side behind the glove check....check the heater core too it might be clog up

Posted on Apr 15, 2015

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My 2003 Pontiac Gran Prix overheats in zero degree weather.


Make sure radiator is full and that all hoses are ok. Then make sure that the thermostat is opening and that your water pump is circulating coolant through the radiator which must not be clogged. Till you find issue run your heater full blast with window open to add additional cooling to engine.

Sep 01, 2017 | 2000 Pontiac Grand Prix

1 Answer

Heat blow cold air


probably heater door that allows heat into the interior not working or whatever controls you have that opens this door defective...1st make sure ur getting heat into your heater core by feeling both hoses which should both be hot, if one not hot then perhaps the valve that opens the water flow through the heater is not opening...sometimes u can see this visibly whereas you can then try to manually open it...

Dec 12, 2013 | 2000 Pontiac Grand Am GT

2 Answers

Heater blows cold


Check the heater matrix valve firstly for it's valve operation and cable operation. Also check that the heater matrix isn't clogged with hair and gunk. this can dramatically affect how much air can blow through it.Check that the pipes leading in and out of it are hot from the engine. If not, then check your engine for coolant leaks, blockages and running temperature. If your engine isn't getting up to heat, then neither will your heater. This could likely be a thermostat which has failed.

Nov 15, 2012 | 2000 Pontiac Firebird

2 Answers

My 2005 Gran Prix does not have heat. The blower only blows cold air, I have changed the thermostst, and it has coolant in it. I dont think it is the heater core because there is no coolant on the inside...


The heater core inlet valve may not be working. It is usually in the heater inlet hose next to the fire wall in the engine compartment and is operated by either a cable or a vacuum line. Check that the cable is attached and not broken or that the vacuum line is attached and actually has vacuum. If vacuum operated, test and see if the vacuum diaphragm of the valve is able to hold the vacuum, if it is leaking, the valve will not operate.

Feb 09, 2011 | 2005 Pontiac Grand Prix

1 Answer

I have a 2000 Ford Taurus my blower is blowing fine the heat is coming out cold i have recently changed my theromastat and the heat is still blowing cold


The heater core (a mini radiator located under the dash) or its feeder hoses are clogged. They are not allowing water to circulate through the heater core. That is where the heat comes from.

Dec 09, 2010 | 2000 Ford Taurus

1 Answer

Heater blows cold air / AC blows hot air


You need to check the resistor valve located on top of the blower motor inside the dash.( or near it. ) It is connected to a a 3 wire plug . Take off the plug and replace the resistor. For the AC, it may need refrigerant . Or the compressor may be bad.

Nov 18, 2009 | 2000 Pontiac Grand Am GT

2 Answers

I have a 2005 pontiac Montana. The heat in the


There is a flap in the venting itself that can get stuck. Or the actuator that moves it can become faulty. It is located above heater core and it's housing. You will have to remove bottom console to access it.

Nov 17, 2009 | 2005 Pontiac Montana SV6

2 Answers

Only the passenger side vents blow cold


The cabin filter might be clogged, try replacing it.

Sep 30, 2009 | 1999 Pontiac Grand Prix

1 Answer

Heater control not working on 1997 pontiac Gran Prix


There is a flat filter that sits between the firewall and the blower. Sometimes the filter is blocked and needs to be cleaned or changed. On older cars the filter is located on the firewall in the engine compartment infront of the blower. In the newer cars the filter is under the dash inside the car and much harder to get too.,

Sep 14, 2017 | 1990 Porsche 944

1 Answer

No heat


1 Inspect Cooling System Mix Coolant level low or flow is restricted. grey_line.gif 2 Inspect Thermostat Thermostat stuck closed grey_line.gif 3 Inspect Heater Control Valve Leaking or defective heater control valve.

Dec 04, 2008 | 2002 Pontiac Aztek

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