Question about 1992 Buick LeSabre

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Why wont the heat work on 1991 roadmaster wagon. thermostat good, water pump good, blower motor works. maybe a vacuum problem? or something with the heater core... how do i fix it?

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Check youre heater hoses coming out of the engine .make sure they both are the same temp ,when the engine is warm going in to the heater core the hoses run up to the fire wall if the hoses are hot on both sides the problem is inside the car make sure the cable is moving form cold to hot if the cable is un hooked you will not have control over the temp .the cable runs under the glove box on the top of the heater box ,there is a small arm that moves back and forth ,the cable hooks up to a little clip make sure this is still attached if it is check youre controler on the dashboard the only way it would be a vaccume problem .is if the defrosters and heater and vents are not working .if this is the problem check for a disconnected vaccume line near the fire wall .or distrubitor

Posted on Nov 18, 2009

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1 Answer

Little heat coming out of vents.


IF YOU CAN'T FEEL THE AIR FLOW OUT BUT YOU HEAR THE BLOWER MOTOR WORKING, BEHIND THE GLOVE BOX IS A CABIN FILTER.REPLACE FILTER
IF YOU HAVE GOOD AIR FLOW BUT NO HEAT:
1;VACUUM LEAKING TO HEATER CONTROL
2;WATER PUMP GOING BAD / NOT CIRCULATING COOLANT,HIGH RPM/MORE COOLANT TO THE HEATER CORE
3;OPEN THERMOSTAT/ENGINE TEMPERATURE TO LOW
1;CHANGE THE DIRECTION FROM VENTS TO FLOUR TO WINDSHIELD. IF NOTHING HAPPEN IS THE VACUUM
2;RUN THE ENGINE INSIDE ON WARM PLACE ON IDLE.NOTE THE GAUGE IF PAS 1/2 TO 3/4. IF PAS 3/4 MARK REPLACE WATER PUMP
3;IF GAUGE STAY BELOW 1/2 REPLACE THERMOSTAT
GOOD LUCK

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1 Answer

Just replaced water pump and thermostat in 2003 audio Quattro 1.8 no heat


Airbound more than likely..if not then check flap motors on heater box.

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2002 Ford Taurus has no heat. Water pump,thermostat,blower motor, the blend door and actuator are all OK. Both heater core hoses are hot. Clamped bypass hose shut. no heat, car did not over heat.Ac does...


Well the default setting for the a/c is defrost, and I might be mistaken on this but I think that bypasses the heater core from the blower motor to the defrost vents. Could there be another door in the heater case, I guess is what I'm trying to ask. Something in there left over from the old a/c days?

You hear the blower motor on fast and furious? Any chance the fan blade assembly came loose on the motor shaft?
If the doors are vacuum operated, a hand vacuum pump might help you. Also check if the switching controls for the vacuum signals are not linked to the unplugged a/c wires.

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1 Answer

Heat problem in my bmw 1993 525i wagon and my blower are not working


check the fuse for your blower problem if not the fuse could be a conection on the unit or the blower unit has died. as for the lack of heat this could be cos of the blower or fan motor as i call it not working but could also be your thermostat stuck open or a air lock in the water system

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I have a 92 Lexus Es300 with 213500 on it, I just had the head gaskets changed, new water pump, timing belt, thermostat, and the blower motor is working fine. But, I still aren't getting any heat in the...


Might not be a hot enough thermostat or make sure there is enough vacuum in the vacuum-hoses. The heater controls might not be getting enough vacuum to operate the flaps inside the heater compartment where the heater-core is. Or something wasn't hooked up right when the head-gaskets were done.

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2 Answers

No heat in my 1994 roadmaster wagon i replaced


If you have the Auto temp control; and you have checked the coolant level then you may need to replace the module that is under the dashboard on the right side footwell,. this is a common problem on these cars. When you remove the plastic under dash panel, look up and there is a module in the duct for the heat that determines the temp so the Climate control works correctly. I pulled mine out of a junkyard car and saved about 80 bucks.

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2 Answers

Heat is not getting warm...just blowing out cold air. also, blower fan will blow sometimes and sometimes not. any suggestions?


I would check to make sur the engine coolant is filled up to the required level. Sometimes if it is low it wont be enough to circulate through the heater core. As for the heater blower, thats a whole other issue. There is a resistor pack which may be the issue. If so it should work on high. Or maybe the blower motor has a bad spot on the armiture. That could cause an intermittant issue. Beyond that there could be some other electrical demon in there. But so long as you get the hot water circulating there should be some heat.

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2 Answers

Location fuse boxes 1991 buick roadmaster estate wagon


one under the hood another drivers side kick panel.  Also check the relays

Apr 01, 2009 | 1991 Buick Roadmaster

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