The a.c. cuts out only 5% of the time

Diver55

New member
2003 The a.c. cuts out only 1/5 the time

I have a 2003 Sport V6. I purchased in the early winter. The a.c. blows ice cold for 15-20 seconds, then blows regular air about 4-5 seconds. The cycle repeats. No warning lights. I switched the magnetic clutch relay with the fog relay. No noticeable change. Had it checked for leaks, no leaks. No noise coming from the compressor or a.c. unit. I'm studying my options. Bring in to the Toyota dealer for a further diagnostic or keep on digging. My mechanic says to maybe wait till it's very hot. If it gets worse, then maybe the magnetic clutch. I just turned to 200K clicks. Lady driven, parked in heated garage, but who knows. Maybe I will invest in a new compressor if I have to. Frame and body is still in great shape. Going to go back and verify if the fog lights work in case I had a bad fog relay. I did hit the m.c. relay a few times. Wonder if it's worth buying a new mag. clutch relay. I'll check fuses but doubt its fuses as all works well. Any opinions would be appreciated.
 
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Look for threads on thermistor replacement to correct AC cycling issues. There's a part number in there for your year that should work just fine. It may be caused by the thermistor being bad or dirty.
 
Might be low on freon. Evac and recharge to verify if you are losing it (leak)

What he said. I doubt it's the magnetic clutch. Usually behavior like that indicates a problem with refrigerant quantity, and less likely a problem with air flow over the evaporator or condenser. The system has safeguards to cycle off if pressures get too low or too high.
 
My mechanic said it wasn't low and didn't have a leak. I will go for a second opinion. He has saved me a lot of cash in the past but I think he isn't that familiar with 4Runners a.c.'s. The Toyota dealer in my city does not have a great reputation. I have a few leads for import car garages. Keep posted. Thanks.
 
A/C evac and recharge is the same for any car. Doesn't matter if its a toyota. If its fully charged then...
Maybe someone can chime in if its a common issue. Or get it diagnosed

Still sounds like freon to me though :/
 
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I think mine has always cycled on and off. Figured it was normal. Saves fuel if anything.


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