It's Like There Is A Blockage. If enough cool air escapes, the temperature in your space never reaches the set point and the system will keep running. When the AC is off, the wheel spins freely. Okay, Let me start over, I have had my vehicle to shops. A Guide to the Top 3 Power Related Air Conditioner Problems, AC Troubleshooting: FROZEN HVAC System? That is a good one, I have the wiring diagrams here and I am looking over as well, you can confirm that when you remove the ground (pink wire) from the ECU the compressor turns off? And I have no desire to figure it out either. This is unlikely because the refrigerant pressure is relevant to temperature. As for the A/C running at +10F outside temperature. Video footage on how to get your car or truck AC compressor to stop turning on and off. Regardless if Idling or driving, The A/C Compressor clutch cycles on and off constantly. Okay, spray some water on the condenser and see what happens. If the air conditioning was off when the belt seized, then the clutch would need replaced. Please confirm this so we can continue. On off A/C switch in passenger compartment does not light up. My Ford Crown Vic 2005 had low refrigerant and compressor would cut off even on normal acceleration (not wot). A leak investigation could also reveal a larger issue with the system … I just had the evaporator on my '97 Tacoma replaced. From the looks of it, the climate control head is commanding the compressor on all the time. At 35, the clutch will stay engaged. I Have Checked The Relay. I am really starting to give the new pressure switch the stink eye. Compressor clutch disengaged and both rad fans stopped running. That is the first good idea I have heard yet! This is part of the programming that is built into the electronic system that takes all extra systems that might rob power from an engine under acceleration and redirects it to the engine itself. A belt drive attached to the engine spins constantly, providing energy for the AC compressor. Compressor runs for 4 second then off for 6 seconds then over & over. A/C clutch engaged all the time. I have a work around in mind. You will also notice air conditioner compressor cycling when your car is under hard acceleration, like when you are pulling onto a major freeway. I have 2011 Mazda CX7. I was talking with the guy at O'reillys. I have replaced; compressor, dryer, expansion valve. Leaks can be repaired through pipe replacement or by using clamps to cover the leaks. … If the switch is stuck on this will cause the problem. My air is nice and cold, has the right amount of PAG and refrigerant, but when the car starts, I can hear the clutch engaging with the system turned off. Yes sir, clutch stays on. I swapped out the complete control head with another today and same deal. It makes you wonder if the dog days of summer are behind us or if they’ll be back with a vengeance next week. Jump to Latest Follow 1 - 5 of 5 Posts. He took to shop and they replaced thermosensor on compressor. Blower motor and fan issues. The compressor clutch doesn’t move; Odd noises when the AC is running; In order to figure out what the exact cause of your AC troubles is, it’s important to bring your car to an automotive specialist to perform a differential diagnosis. He was questioning the brand new triple pressure switch I installed and wanted to get me another one. I will get one tomorrow and let you know the results. You can always test the clutch by disconnecting it and seeing if the cool air stops. I have this exact issue haunting me right now. If the system were where it is supposed to be, the compressor would kick on/off constantly once the system has been run for a little while. It’s possible that your unit is no longer adequate for the needs of your space. When I first turn the car on I can see the A/C clutch being engaged, but after the car runs for bit, then clutch disengages. Very weird! It sends a signal to the ECM to turn on and when you turn off the A/C, the signal is still being sent. A layer of grime on the fan blades can also slow it down, so again you may just need a good cleaning. The electrical auto guy says it is a thermostatic meter. If this shuts off the compressor, then we at least know which direction to look. Ken, I removed the signal wire running from the relay back to the ECU. If your thermostat is not working correctly, the unit doesn’t know to turn off even when the temperature is reached. Is being cut when the temperature in the 70 ’ s a cleaning. ) for the AC compressor or evacuation and recharging of the complete control with! Copy of our helpful guide to the pump rotor of the engine starts to turn off even the. Light up acting normally then it ’ s air conditioning is on only way to stop is... 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