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92 cad deville new thermostat heater still blows cool air what I need to do to fix this problem

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If you know for sure you have hot coolant going in and out of the heater core(feel the hoses and make sure the heater control valve is open if it has one). I would say the air blend door is stuck in the cold position and it is usually controlled by an actuator.

Posted on Dec 09, 2016

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You should check the heater control valve it might not be opening up, also if it's vacuum controlled check to see that there is a suction going to the hose and if it is electrically controllable check that it has power to it

Posted on Dec 09, 2016

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My 2008 ford ranger has a heater that wont get hot.w/temp knob full hot, cold air. Checked fuses. I heard about a "door" inside the heater that can get "stuck", but just rumor. It...


hi Planeman.
Why is the heater in my car not working? Ken Mattson, owner of Len's Automotive in Bellevue, Wash., says a car heater can stop working for a number of reasons, including: A low antifreeze/water level in the radiator due to a leak in the cooling system. A bad thermostat that isn't allowing the engine to properly warm up.11 Dec 2013

Why Isn't My Car Heater Working? ' Angie's List

https://www.angieslist.com/articles/why-isnt-my-car-heater-working.htm Search for: Why is the heater in my car not working?
Why is my car heater not blowing hot air?Hot coolant from the engine passes through a heater core, which looks and functions a lot like a small radiator, and a blower motor forces air through it. ... It's also the reason that a plugged heater core, stuck thermostat, or air in the cooling system can all cause a car's heater to blow cold.9 Jul 2017When Your Car Heater Blows Cold Air - Lifewirehttps://www.lifewire.com/when-your-heater-blows-cold-air-534667
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What are the symptoms of a bad thermostat?A motor with a bad thermostat will run fine for the first few minutes, then overheatrapidly. Other symptoms include the engine and radiator making a rumbling, gurgling, boiling sound: like a steam pipe knock, if you've ever heard one of those. A thermostat sticking open can make your heater not work in the winter.Auto, Car, Truck THERMOSTAT Repair bad thermostat symptoms
or go to this link if you need more help.
2008 ford ranger has heater that won get hot Google Search

Nov 19, 2017 | 2008 Ford Ranger

1 Answer

The air condition blow out cool air but stop in 3 second, low fan, the switch seen to work ok the inside switch, the freeon was put in to days ago the pump is turning but hi persure is not activating to...


need to replace the pressure sensor and fill up the gas 134 R or the filter gas is blocked , when is running the pipe are one hot and the others is cold be sure the vent fan is switch on

May 24, 2010 | 1997 Cadillac DeVille

1 Answer

92 cad deville, blower works, but no warm air...


check thermostat,flush your system rad or heater core could be clogged

Jan 12, 2010 | 1993 Cadillac DeVille

3 Answers

Heater only blows heat when the car is moving


These had a problem with getting air pockets in the heater core, because it sits lower than the engine. if the cooling system is rusty, and hasn't been serviced regular, the core might be part-pluged or pluged.

Sep 30, 2009 | 1999 Ford Taurus

1 Answer

My 91 cadillac devile has no heat , just cool air blows even when


The heater in your car depends upon a flow of hot coolant going through the heater core in order to get hot air into the car. If the heater core is partially plugged, it will restrict the flow. If you have a head gasket that is putting exhaust into the cooling system, it will eventually get into the heater core. When this happens there is no coolant in the heater core to make the air warm. If the water pump vanes have corroded away the result will be very poor coolant circulation causing the heater to not blow hot air. If your car is equipped with a heater control valve that is not functioning properly, the coolant flow will be restricted. One or a combination of these factors is likely the culprit in your case.

if the car is not overheating, the thermostat is working fine.... replace or flush the heater core multiple times to try and eliminate sediment build-up.

Jan 14, 2009 | 1991 Cadillac DeVille

3 Answers

1991 cadillac deville NO HEAT


I had the same problem in my 1991 caddy, and turned out to be the blend door. It is located in back of the glove compartment. There are two kinds, the automatic blend doors and the manuel ones. Since the temperature is automatic and programmed to stay where it is set, it would be an "automatic blend door". Not a hard fix...

Oct 18, 2008 | 1991 Cadillac DeVille

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