Question about 1993 Buick Century
CAR WON'T BLOW HOT AIR HELP
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
Heater Control Module
Posted on May 31, 2009
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Posted on Jan 02, 2017
There could be a number of issues at work here. First, and most important is to address the source of the wet floorboard on the passenger side. Get you fingers wet and then rub your fingers together. Does the wetness feel a bit more slippery than just water? Smell it. Does it have a bit of a sweet smell? If so, this could be coolant leaking from the heater core into the passenger compartment. Slow leaks will take a while to notice in the coolant level. If this is the case, replacement of the heater core will be necessary. The wetness could also be just rainwater coming in from an open firewall plug, damaged door seal, or perhaps windshield seal, where rust or a poorly installed replacement could result in leakage. Now about the heat. First, is the engine coolant reaching operating temperature? Run the vehicle for at least ten minutes. Then feel the upper and lower radiator hoses. Both should be hot. If not, you may have a thermostat issue that is keeping the coolant from getting warm enough to produce sufficient heat. If the hoses are hot, then check both the supply and return heater hoses to the heater core. They should both be hot as well. If not, then a clogged heater core is usually the culprit. You may be able to get lucky and back flush the core, but most times replacement is required. If everything to this point has checked out OK, then it is likely that the blend door in the heater control box is inoperative and will not divert the cabin air through the heater core. This is hard to determine as it is all under the dashboard and sometimes difficult, if not impossible to see. Check the control head vacuum lines for cracks and breaks. Look at the vacuum actuators and ensure they are operating and that their linkages are connected as move freely. Repair or replace any problems found.
Posted on Dec 14, 2013
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