First AC problem of this year.

[SpareParts]

I have the dreaded 3 light flash then nothing.
Pump clutch does not engage.
I tried jumping the low pressure switch on the dryer. Nothing.
Tried unhooking the battery for a while. Nothing.
Swapped relay. Nothing. All fuses good.
It has no codes for HVAC.
When commanded on with scanner, light flashes 3 times then, nothing.
I would think jumping the low pressure switch would allow it to come on if pressure was the problem?
What ever happened is recent. Scanner says it has been malfunctioning for the last 12 starts.
Any ideas where to look?

 

[mikez71]

Don't you hate it when the computer keeps secrets from you?

Verify the A/C cooling fan activates with a scanner.

You're not in defrost mode right?
(Although defrost mode automatically activates the compressor, it doesn't like you telling it what to do apparently.. )

 

[SpareParts]

Went back out and hooked up the scanner.
When i command to AC relay on the pump activates.
Busted out the gauges and the needles do not budge so the AC system is empty.
Probably going to be a pain in the a** to find the leak im sure.

 

[SpareParts]

Looked over the system as much as possible with a UV light hoping at some point someone put dye in it.
It has dye in it. The pump discharge hose has dye on it. No other dye front to rear. Did not check either evaporators.
Ordered a new hose and accumulator.

 

[j91z28d1]

if it's complicated empty the Leak should be pretty big.