Question about 1996 GMC Yukon

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Heat doesnt get hot inside 96 yukon, heater hoses get hot. wheres vac sorce to heater control.

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The temperature control bend door is electrically (not vacuum controlled) moved by a part called the blend door actuator motor, it is deep inside the dash and is what has gone wrong here, very common problem.

Posted on Dec 11, 2009

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Posted on Jan 02, 2017

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1 Answer

1996 yukon - heat blowing cold


If the engine top radiator hose is actually at HOT to the touch ( it will burn you ) and the coolant in radiator is full touch both heater hoses. One side should be HOT and other side warm. If that is all ok check fuses for heater and HVAC, both use same doors in hear control. I hope this helps you.Lee

Feb 10, 2014 | 1999 Chevrolet Silverado 1500

1 Answer

NO HEAT


May have a clogged heater core, feel hoses going in and out of heater if they're warm, suspect blend door actuator under the dash they like to break! Sometimes they make a faint noise when switching from hot to cold. If hoses are not hot check the hoses for a valve usually vacuum controlled. Have a helper play with the heater controls if the vacuum doesn't exist to the valve it won't open. If you have vac at hose valve is bad. Rate my answer and let me know how you make out

Nov 21, 2013 | 2000 Ford Taurus

1 Answer

00' yukon xl no heat in front but works fine in back


You might want to try back flushing the heater core.This is probably your problem.If you know where the heater hoses go into the back wall of the engine compartment then feel the hoses.They should both be hot to the touch with the engine at operating temperature.If one is hot and the other you can hold your hand on it all day.Then try flushing the heater core.If it warms up some or gets any better.Then this is your problem.Hope this helps.Good luck.

Feb 26, 2012 | 2010 GMC Yukon XL

1 Answer

<yn 81 monte carlo -


check the coolant. then outside under the hood near where the 2 hoses go into the heater core there is a heater coolant control valve. make sure the vac line is connected and not broke. feel the hoses there at the heater core after it warms up. are they hot? if not the valve isnt opening and letting coolant into the core

Jan 22, 2011 | Chevrolet Monte Carlo Cars & Trucks

2 Answers

No heat


No heat could be caused by a number of things, but first check the coolant and make sure that its full, next i would check the thermostat if its opening to soon its not allowing the engine to get hot most likely you would have a check engine light on with a code if this was the case being your car is post 96 and OBD2, another possible cause could be a blockage inside the heater core not allowing the hot coolant to cirrculate, if your coolant is dirty it may require a reverse flush of the entire cooling system to try and remove the dirt/rust.

Dec 06, 2010 | 2001 Ford Taurus

3 Answers

2003 dodge durango front heater will not blow heat. but when driving heat will slowly come throught the heater vents. what should i check?


Since your blower is working and it is a heat issue,thats where we'll start,First thing is have you checked the coolant level in the radiator when engine is cold,make sure it is filled to top,next verify you have coolant in reserve ,Start your van and get it up to normal operation temperature,If your heat gauge on the dash works correctly it should be 190 degrees,Now lift the hood and locate the two heater hoses going into the heater assembly at the fire wall,Both hoses should be hot to hold on to,if both are hot and no heat inside your problem will be the blend air door in heater assembly.
if neither hose is that hot you need to replace the thermostat in the engine to get it up to 195 degrees.
if one hose is hot and one is luke warm then the heater core is blocked and to blame. hope this helps you.

Jan 08, 2010 | 2003 Dodge Durango

1 Answer

I don,t know with vac hose goes to the heater control valve


The heater control vaccum sorce,should come out of the firewall from the inside of the car.

Oct 06, 2009 | 1995 Chevrolet Monte Carlo

1 Answer

No heat in my 2002 chevy s-10. Already changed


The heat is controled by a control valve installed in one of the heater hoses. It normally is controled by eather a vaccuum line or a cable coming from inside the truck at the dash where you slide the hot to cold adjustment.Find the valve under the hood at the hose,have someone move the control inside the truck.If its vaccuum you can pull off the hose and see if you have vac.If its a cable you should se it move.

Sep 03, 2009 | 2002 Chevrolet S-10

1 Answer

1986 buick lasabre heater fan workes, but no heat at all


could be a vacuum switch on the heater hose. The heater hoses are the small hoses ( 1inch, usually black or red) that run from the motor to the inside of the car. They should be warm when the car is up to temperature.

The vac switch controls the water flow to the heater core. If the vac valve is bad or the vac line that feeds it is bad it will not allow water to enter the heater core.

Could be a plugged heater core too.

Check the water level in the radiator as well. If the engine is low on water often the first to go is the heater.

Dec 20, 2008 | 1986 Buick LeSabre

1 Answer

Luke warm heat


YES, THEIR IS A HOT WATER CONTROL VALVE, ITCAN BE OPERATED BY VACUMN, OR CABLE, VAC, TYPE WILL HAVE AVACUMN HOSE TO IT, PLS CHECK IT FOR CONDITION, CRACKS, SWELLING, IF OK, THEN WITH ENGINE RUNNING, HEATER CONTROL IN HOT POS. PULL HOSE OFF VALVE, PUT FINGER OVER END, FEEL FOR VACUME. IF THERE IS, MOST COMONLEY RESULT IS THAT VALVE NEED TO BE REPLACED.

Oct 01, 2008 | 1999 Jeep Cherokee

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