This morning I had the heater on and heard the squeal but it stopped when I turned the heater off, now it is a constant sound.
Feb 9, 2012 at 1:12 AM
I am hearing a squeal coming for engine compartment, think it is a belt, but my rpms are high.
1994 MAZDA MIATA
MAZDARICK
- MEMBER
- 1 POST
Advertisement
CJ MEDEVAC
- ✓ASE Certified Mechanic
- 11,004 POSTS
ON MANY NEWER CARS, THE A/C AND THE HEATER (USING A SETTING WITH DEFROST MODE) TURNS ON THE A/C CLUTCH, THUS TURNING TURNING THE COMPRESSOR.
OF COURSE THE A/C SETTING WOULD COOL THE INTERIOR OF THE VEHICLE. THE DEFROST USES THE EVAPORATOR TO REMOVE MOISTURE FROM THE HEATED AIR BLOWING ONTO THE WINDSHIELD, DEFROSTING IS FASTER THAN IT USED TO BE IN OLDER CARS.
IF USING A HEATER SETTING THAT DOES NOT USE DEFROST, SEEMS TO GIVE NO PROBLEMS, THIS MIGHT LET YOU POINT YOUR FINGER TOWARD A BAD A/C COMPRESSOR
IT MAY BE THAT EITHER THE A/C COMPRESSOR IS LOCKING UP (REPLACE) OR THE A/C CLUTCH MAY BE GOING BAD (REPLACE)
REMOVING YOUR BELT AND TURNING ALL PULLEYS WITH YOUR FINGERS MAY ALSO FIND ANOTHER PULLEY NOT TURNING FREELY
THE INNER CENTER PORTION OF THE A/C PULLEY IS PART OF THE A/C CLUTCH---NOT ONLY TURN THE PULLEY, BUT SEE IF THE INNER PART WILL TURN TOO, IF IT DOESN'T, THE COMPRESSOR IS MOST LIKELY BAD
KEEP US POSTED
THE MEDIC
OF COURSE THE A/C SETTING WOULD COOL THE INTERIOR OF THE VEHICLE. THE DEFROST USES THE EVAPORATOR TO REMOVE MOISTURE FROM THE HEATED AIR BLOWING ONTO THE WINDSHIELD, DEFROSTING IS FASTER THAN IT USED TO BE IN OLDER CARS.
IF USING A HEATER SETTING THAT DOES NOT USE DEFROST, SEEMS TO GIVE NO PROBLEMS, THIS MIGHT LET YOU POINT YOUR FINGER TOWARD A BAD A/C COMPRESSOR
IT MAY BE THAT EITHER THE A/C COMPRESSOR IS LOCKING UP (REPLACE) OR THE A/C CLUTCH MAY BE GOING BAD (REPLACE)
REMOVING YOUR BELT AND TURNING ALL PULLEYS WITH YOUR FINGERS MAY ALSO FIND ANOTHER PULLEY NOT TURNING FREELY
THE INNER CENTER PORTION OF THE A/C PULLEY IS PART OF THE A/C CLUTCH---NOT ONLY TURN THE PULLEY, BUT SEE IF THE INNER PART WILL TURN TOO, IF IT DOESN'T, THE COMPRESSOR IS MOST LIKELY BAD
KEEP US POSTED
THE MEDIC
Feb 9, 2012 at 1:40 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.