Question about Buick Cars & Trucks
Have replaces thermostate
No hot air, sounds like the heater core is bad. the core is probably directly your dashboard, ya it's a big messy job to replace. Cost, probably somewhere around $500 or more,,,
Posted on Dec 09, 2014
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Posted on Jan 02, 2017
SOURCE: heater core replacement
OK, Ifound the problem with mine. Dont unplug your air dryer. I checked the 2 hoses coming out from the heater core and still one was hot and the other not hot. The top one comes from the radiator fill tank and the bottom one comes out of the core and goes around to the front and into the water pump. I disconnected both close to the core and could runwater through both directions so upon further examination, I disconnected the hose at the water pump and no water flow. The hose was plugged up with something. Once I cleared it with a hanger and reconnected it I had water flowing through the core and great heat. Hope this is your problem too as it is aneasy fix
Posted on Oct 23, 2008
There is a blend air actuator on the passenger side that causes the blend air door to stay open to heat no matter what. It's below the left side of glove box, facing dash, and you can work it by hand and get it to close. If that works, get a new one. They're very easy to install.
Posted on Jan 07, 2009
The linear actuator that regulates the blend of air between hot and cold was broken and needed to be replaced. That was my suspicion. Fuses were all good. Relays were all good. Compressor pump cycled. Freon was "proper". Dealership only charged about $400 in parts and labor to confirm my guess.
Posted on May 08, 2009
SOURCE: 1993 buick century
turn on ac on high cool look under hood .to see if compressor clutch is turning make sure belt not slipping or loose.if compressor clutch is not turning.check and replace fuse relay and check the electrical connector for breaks.if all is good .compressor clutch still dont run.you can remove compressor BUT YOU HAVE TO TAKE IT TO GARAGE TO DISCHARGE FREON OR 134 REFRIGERANT OUT OF SYSTEM .AGAINST THE LAW LET IT OUT IN ATMOSPHERE.YOU PAY A STIFF FINE IF CAUGHT. you can remove compressor replace clutch remove the pulley .you need tools to work on it.if compressor is old replace it. NOW if compressor clutch was turning you need to check the refrigerant pressure you need a manual to locate low pressure side and high pressure side.you need a manifold gauge set or you can buy the individual pressure gauges .at auto zone or advance make sure you get the right gauges .see if your car still have the R12-FREON. OR 134 REFRIGERANT FITTINGS.WARNING BE SURE TO WEAR SAFETY GLASSES WORK IN WELL VENTILLATED AREA. FREON AND 134 REFRIGERANT DEADLY IF INHALE.GO TO CAR LOCATE LOW SIDE WOULD BE A BLUE CAP AT THE EVAPORATOR LINE GOING INTO FIRE WALL OR WHERE THE ACCUMULATOR LINE AREA IS.THEN FIND RED CAP CONNECTOR IT BE ON THE CONDENSOR LINE AT TOP AT RADIATOR .NEXT TO COOLING FANS.PRESSURE LOW SIDE BLUE CAP PORT SHOULD BE 28 PSI THE PRESSURE AT THE RED CAP PORT SHOULD BE 190 TO 200 PSI. THATS GOOD PRESSURE.BESURE YOUR CAR IS RUNNING AC ON MAX.COMPRESSURE CLUTCH HAS TO BE TURNING COOLING FANS SHOULD BE RUNNING TO COOL CONDENSOR.IF LOW SIDE IS LOW AND HIGH SIDE LOW REFRIGERANT LOW.PUT RED CAP BACK ON HIGH SIDE. WHEN YOU ADD REFRIGERANT YOU PUT IT IN LOW SIDE .BLUE SIDE 28 PSI WHAT PRESSURE LOW SIDE SHOULD BE.KEEP CHECK ON HIGH SIDE PRESSURE DONT LET IT EXCEED OVER 200 PSI IT WILL BLOW UP.IF BOTH SIDE IS 0 PRESSURE ITS BEEN A LONG TIME SINCE AIR CONDITIONER BEEN OPREATING.YOU HAVE TO TAKE IT TO GARAGE.HAVE SYSTEM FLUSH REPLACE ORIFICE TUBE AND ACCUMULATOR.ITS PROBABLY FULL OF MOISTURE.OR SCREEN IN SIDE OF IT STOP UP.THE SYSTEM HAS TO BE PUMP DOWN FOR LEAKS .AND ADDING OIL TO SYSTEM.THEN SYSTEM HAS TO BE CHARGED UP.IF YOU GOT CLIMATE CONTROL AIR CONDITIONER .YOU HAVE SUN LOAD SENSOR -OUT SIDE TEMPERATURE SENSOR -INSIDE TEMPERATURE SENSORS .THE SYSTEM HAS TO BE CALIBRATE USING A SCANNER.WARNING BE CAREFUL WATCH YOUR SELF WHEN WORKING ON AC SYSTEM ITS A DANGEROUS JOB IF YOU NEVER DONE IT.WHILE CAR RUNNING WATCH YOUR HANDS FOR MOVING BELT AND COOLING FANS .SEE YOU HAVE MANY THINGS TO CAUSE CAR NOT TO BLOW HOT AIR NOT COLD AIR.
Posted on May 31, 2009
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