My question is it normal for the A/C compressor to cycle several times a minute? The A/C is cooling very well and cools the cab even in very hot weather. It was over 90 today and humid.It doesn't seem to cycle as much in mild weather.

I took it in for the dealer to check everything today,and was told everything was fine,including the charge,ect.ect. The service manager took it for a ride and felt it was running normal. This is my first F150,however I have leased 3 Expeditions and never noticed the short cycling with them. The truck is a month old so if they missed something it gives me three years to see if it's going to stay working. I would like some feedback from others to help me know what to do, or not to worry. Thanks in Advance!

Fred

2005 F150 Lariat 4 x 4

 

Several times a minute is not short cycling. every 10 seconds would be short cycling. You have high and low pressure limiting switches on every AC system to keep the compressor from running should you get high or low pressure.

 

I timed the cycles,they are every 8 seconds. That's 450 times per hour! I forgot to mention that I have been in the A/C trade since 1972. I repair A/C units from residental to industrial,however I have little experience with Auto.

Fred

 

https://www.ford-trucks.com/forums/s...d.php?t=248434

My beauty has been cycling every 7-8 seconds from day one. I've had the AC system checked out and the dealer didn't find anything blatantly wrong. They report that vent temp is ok and manifold pressures are within speck.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" /><o></o>

 

Wizardeye, Thanks for the link. It very helpful to get feedback from others like yourself.Thanks!

Fred

 

That seems strange to me. I went out and ran mine around the block and sat in the driveway...5 cycles per minute. 04 STX 4.6 4X4

 

Biggziff, mine doesn't short cycle in the driveway either,mostly going down the highway and only after it's been on for 5 to 10 minutes. I don't remember it doing it as much in cooler temps either. The hot weather seems to increase the cycles to every 8 seconds. If I can't find a cure, I will do the same thing I do on my other Ford's when there's a noise problem, and that's turn up the radio!

Fred

 

Could it be a fuel savings thing? I had a Mazda that you could set to cycle on off more and it was called "economy" mode.

 

Bleoh, thats possible, however if it causes the belts and A/C clutch to wear out prematurely then how much of a saving would that be?

 

Worked fine on my Mazda for the 10 years I had it, so I'm not sure how much extra wear it is.