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Heater turns on but no heat coming thru vents

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Its prob. the fan limit switch not turning on the fan... after running for a while does the burner stop burning need more help e mail me at airforceac@live.com

Posted on Oct 01, 2010

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Posted on Jan 02, 2017

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Heating, AC and vent problem


The actuator door that is behind the dash that closes off the heater core from shooting hot air thru the vents might be your problem. When you turn on your ac the actuator shuts the door to prevent the air from flowing thru the heater core into the cabin, this may be your problem if everything else is working properly. Let us know.

Oct 03, 2013 | 1995 Buick Park Avenue

1 Answer

No heat


Usually a sign of a problem with one of the blend doors under the dash.
The blend doors direct air thru the heater core and the outlet vents.

Feb 28, 2013 | 1996 Mercury Sable

1 Answer

2000 gmc sierra 1500 blow hot air but the air is in the dash not coming out of the vents, why?


Usually a sign of a faulty blend door.
The blend doors direct air thru the heater core and out thru the vents.

Jan 16, 2013 | 2000 GMC New Sierra 1500

1 Answer

A little heat is coming out of the vents in my 2001 oldsmobile alero but its not blowing out


Could be a problem with the blower motor, or a blend door.
The blend doors direct air thru the heater core and out thru the vents.
Someone would need to remove the blower motor and check it.

Jan 15, 2013 | 2001 Oldsmobile Alero

1 Answer

Cold air comes out front vents in 1999 windstar


Usually a sign of a faulty blend door under the dash. The blend doors direct air thru the heater core and the vent outlets. One blend door is directly behind the radio.

Dec 18, 2012 | 1999 Ford Windstar

1 Answer

Heat coming from vent when nothing is on. AC is noisy when turned on but is not blowing out cold air. What is causing this?


Could be a blend door problem. On most modern cars the coolant flows thru the heater all the time, and the HVAC system controls the cabin temp by opening and closing vent doors. When you turn or slide the temp selector it makes the blend door or doors open and close for the heater core and A/C evap.
I would have someone check under the dash and see if the doors are moving.

Jun 27, 2012 | Cars & Trucks

1 Answer

Smell of burning oil out of heater vents


Have you checked under the hood,Mark? The heater commonly pulls outside air thru the vents and can get air coming up from the engine,so I'd look for a smell outside the car,under the hood.Let me know what you find.
You can alleviate it some by using the recycle air button on your heater,but you need to find the source quickly,so you don't have a fire. don-ohio (:^)

Nov 19, 2011 | Cars & Trucks

2 Answers

Antifreeze steam comeing through vents


Your heater core has a leak, it's like a small radiator that heats up and the blower motor blows air thru it to create heat in the car. It is leaking anti freeze into the heater box.

May 12, 2010 | 1998 Mercury Sable

2 Answers

BMW E35 95, no heat coming thru vents


check the hoses going through the firewall to the heater assembly,they should be hot.there is a vacuum controlled assembly driven by the climate control assembly.check the vacuum and the cables

May 23, 2009 | 2001 BMW 5 Series

2 Answers

Smoke coming in the vents when heater is turned on


sounds like heater core you will have to pull dash up and remove heater assembly to replace heater core it is a big job not for the faint of heart good luck

Oct 04, 2008 | 1991 Chevrolet C/K 2500

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