Question about 2007 Chevrolet Chevrolet Silverado 1500

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The ac started smelling like mildew for a couple of days and now it is blowing regular air.

The clutch kicks in for a few seconds and then drops out for 10-15 seconds

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Needs regassing thats all ,all Ac R134 systems lose gas after a couple of years ,its so corrosive that in the end it rots the alloy pipes out from the inside after 20 yrs

Posted on Oct 06, 2015


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2005 jeep cherokee gets stuck in kick down intermittently

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not sure where the fuse is for sure either under hood or drivers side under dash,but if the refrigerant gets low as it will over time or if theres a leak the ac clutch will not kick in. even with heat on defrost the ac clutch should kick in and out if ts working proper

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I have a 2001 Ford Mustang V6, the ac is blowing warm air. We checked the refrigerant and it is full. The ac compressor will kick on for a few seconds and then kick off. Why is the compressor not staying...

it's either low (in spite of your readings) or your a/c clutch is not working correctly or you have too big an air gap in the clutch.
First, just disconnect the 2 pin connector from the a/c pressure cycling swithc and jumper the 2 pins with a wire to force the clutch to stay engaged. See if it blows cold then, and stays engaged. You can run this way for about 15 minutes before you have to pull the plug.
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My 2003 Duango has a bad blower motor resistor, I think. The back fans blow fine but nothing in the front unless I kick the little box in the passenger side. Ordered a new one, but now the ac blows hot....

likely two different issues ... the clutch that allows the compresser to operate is controled by several things
1. if refrigerant (r134a) is low then the clutch will cycle or not come on at all as the pressure in the system drops below a critical value .. in general if this is the case it may work better (for longer) if it is really hot out .. and maybe not at all when its cool
2. the system detects the fact that the front blower is turned on before it will allow the compressor to operate .. could you have damaged the fan speed switch assembly or wire connectors while kicking or changing the resistor ???
3. the switch that detects low refrigerant pressure could be bad and that switch sometimes operates a relay that has a high failure rate in some car makes ..that would be called the compressor clutch relay, AC relay or some such ...the nature of this relay problem is that the clutch turns on and off randomly then eventually doesnt come on at all ..

if there is no damage to the blower switch or wiring then i would check the refrigerant pressure .. in r134 systems slow leaks are often seen that cause the pressure to drop to the point where the system cant make up its mind about running. typically the compressor will run for a few seconds at a time .. a steady but fast cycling (not random) you can get a r134 pressure gage at any auto parts shop but you should know how to use it or find someone that does ..

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here are two switches that are the usual causes of the cruise kicking out. they are both under the dash. One is the switch for the brake lamps (stop light switch). the other is for the clutch if you have a manual transmission.

if you follow the brake pedal up under the dash you'll find two switches at the top of the pedal. (it may be one switch but I think its two). the top one would be for the cruise control. if the switch is loose it will cause the cruise control to think you're stepping on the brake and that will disengage the cruise control

same with the clutch pedal if you have a manual transmission; if the switch is loose it will indicate you are pushing the clutch pedal in and cause the cruise to kick out

other than that you'll have to check all of the connectors. If it does engage then the fuses and actuators should be good and it would be a loose connector or switch that's kicking it out

also, i assume your speedometer works; if its not then that's your problem as the cruise won't engage under 30 mph

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oh oh, better get the car to a transmission repair shop,
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