Ac light blinks three times when pressed? And it seems the compressor is always engaged?

mikez71 said:

Possibly pressure is too low, could be evap temp, but if it never kicked on, evap shouldn't be too cold. A good scanner would help..
They do wear out. Once had one where the clutch was too worn, gap was too big. Magnet not strong enough to engage.
Mine is quite weak in the summer and a little noisy, think I will need a new one myself next year..

Reminds me of the time boss' friend brought their 2000 kia in to the hotrod shop. We were used to AC pressure switches being the main cause of a compressor not turning on. Turns out it was all computer controlled, and if the A/C fan didn't work, it wouldn't kick on.
I hate computer control for simple things. Never did get to tell him..

Starting to think nobody should work on anything new-ish without a scanner.. #1 diagnostic tool along with a meter..

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mikez71 said:

yup, leaked and low pressure. Here's some other things to try...

A/C light blinks 3 times and won't engage or turn on

Need some help. My battery died two days ago, and I replaced the battery, ever since my A/C won't engage or turn on. A/C was working before dead battery I have a 00 GMC Yukon XL SLT with automatic climate control with rear climate control. I have removed all the HVAC &AC fuses and relay's...

www.tahoeyukonforum.com

AC fail/light flashing

Hello All, My 2010 'hoe is not blowing cold air and the AC Snowlake flashes three times when it is activated. I tried a trick I read where you try to reset something by pressing the recirculate air button and the snowflake at the same time for 10 seconds. It did not fix the issue. A bit...

www.tahoeyukonforum.com

reset procedure
ambient temp <35 degF ? (Never heard of it until now)
A/C fan not working

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Joseph Garcia said:

As @mikez71 stated, there is an outside temperature below which the air conditioner won't turn on. If you attempt to turn the air conditioner on during these cold outside temperatures, you will get the 3 blinks from the air conditioner button when you push it.

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LurkingLuke said:

I have a somewhat related problem. My AC button and operation work fine, but my Recirculate button (which used to work fine) does the 3-blink think without engaging the recirculation function. If it weren't cold and dark out (and if I weren't a lazy bum) I'd check the fuse, but while I'm here I thought I'd ask in the hope it's a quick answer.

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