When i turn my air on high speed it cuts off. I turn the air off for a few minutes,then it runs fine on low.I took and changed the blower motor resistor,and it ran fine for one day ,then it started cutting off again.
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Re: air wont blow
The high speed setting on any blower bypasses the dropping resistor completely so I suspect you have a failing switch contact.
If you can access it, some 'contact cleaner' from an electronic supply outlet may help to restore its operation but generally, once a switch develops problems, it will fail again.
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air lock in the cooling system get a plastic bottle cut the bottom off turn upside down put on radiator filler and run engine cut full off water wait until all air bubbles stop then remove and put cap on see how that goes
Souds like it's way low on coolant. The heater will blow cold air when the cooling system is so low that there is no water (coolant) running through the heater core. Then the thermostat opens, it trys to be normal but the system is low so it gets too hot in just a few minutes. If its that low, there must be a leak somwhere.
check the refrigerant level. The compressor is running until the low pressure or high pressure switch switch cuts it off.
Running the unit without enough refrigerant will damage the compressor because the lubricating oil is dissolved in the refrigerant. This is the reason for the low pressure switch cut off--to protect the compressor from damage.
If pressure gets too high, the compressor seals will blow. Thus the reason for the high pressure switch. Too much refrigerant or too much air in the system (due to a leak) will cause high pressures.
If refrigerant level appears to be correct, then suspect trapped air from a leak causing a high pressure cut-off. If refrigerant is low, suspect a leak causing a low pressure cut-off.
Switch the relay with one of the other relays to make sure that this relay is good then go to the HVAC control programer which is behind the floor vent (middle). The Blk/gray wire is the one that supports the relay coming out of the HVAC programmer, but there is a chance that this programmer is bad. If that proves to be the case, I may even have one...let me know.
Do you have gages you can hook up?check preasure when A/C clutch is on preasure low should be about 30 and high should be about 180,if high side is higher you got a blockage some where usealy they will plug at the recever dryer or the expansion valve
i assume u r refering to the cooling fans,,, if this is so the freon is low ,fans come on and lower the high side ,there fore lowering the low side and the low side switch cuts it off and on,,charge it up
it could be the a/c clutch is starting to go. They usually run ok for about an hour and then cut off. Sometimes you can shim the clutch so it is tighter, or just replaqce the clutch. Sometimes you have to remove the compressor to replace the clutch.
You may have an air pocket in your system which some times happens. One way to get rid of it is to take the upper hose off on the engine side, fill your system with water until it runs out from your engine block, replace the hose, start your car turn you heater on and set to hi keep the radiator cap loose until the temp start to rise then close tight. Once the air pocket had been remover you can drain some of the water from the radiator using the lower drain plug and add antifreeze.