2009 Corolla A/C Inop
Air conditioning blows warm.
Engine off Hi side is 110 psi lo side 30 psi….. that seems odd to me.
This has just been recharged.
Vehicle running with ac on hi side 110 psi lo side 25 psi.
My gages are working, checked em.
I am going with bad compressor unless someone disagrees.
This compressor has no clutch on pulley.
Middle bolt does spin on compressor pulley….common issue.
Valve inside compressor matches scanner pid at around 960 milliamps.
no codes in hvac system.
This system has expansion block.
It’s got no clutch but does the face of the A/C Pulet separated from the face? They shear and separate causing a disconnect from the internals. Sometimes you hear it and other times unless you remove the cover and put hands on it you wouldn’t know. If It is sheared out some zip ties to connect them both and verify. It will need a compressor at that point then.
Hello Darren, That is a strange one. Usually, static pressures (system off, not running) balance out and show approximately the same as ambient temperature. If you decide on the compressor, make sure to replace the drier and inspect the expansion block for debris. This may need a condenser as well because they cannot be flushed out, the passages are too small. I have not seen a compressor…
Normal is equal static pressure. If compressor is working and there is restriction, should show very low and very high running. To have the pressures staying at 110 and 30 not running would require the compressor to have run with a complete blockage. Expansion valve would be suspect.
Did you check the blend door cable , they are getting bad and no temp . adjustment . Sorry , I did not see that was with engine off , my bad 😢
Sounds like clogged condenser. Feel if the compressor discharge hose is very hot before condenser. I believe the high pressure port on this vehicle is after Condenser as is therfore reading low.
Try to recover and vacuum the system again , watch pressure while doin it . . You can also remove the lines and check for blockage for every component in part , except the compressor , also look to see if mechanical failure or so , check The discharge line , if it’s dirty , or any metal particles then your condenser and drier are clogged up .
Freon at 25psi will be cold. Is the low pressure line cold to the touch? Blockages in my experience show close to 0 and even a vacuum at times. Sounds like pressures are ok. Though the high side should be closer to 200 ..you would think ..
ive had a similar case on an accord. It boggles me for a bit because the ac would start out cold for less than a minute. Quickly would become ambient temp. Pressures were confusing me so I pulled the lines off the expansion valve and found the first of many little black plastic balls from the ruptured drier. curious if this will be the case here. Did you evacuate and see how much air was in the…
Darren, Do the pressures change when the control valve is disabled and reenabled?
Recover and verify proper refrigerant charge. Although an undercharge doesn’t explain your static pressures it’s easy enough to check.
The only scenario, that I can think of, to get these numbers is that the compressor is not turning but, is sealed and that the expansion device (or condenser outlet) is sealed so that no liquid (or gas)is getting thru. There is only a little spec of gas, no liquid, that is stuck in the lo side, maybe coming out the the oil in the evap. All of the liquid is held in the hi side so the high side…
Can you look at the duty cycle command and correlate this with a scope on control wire of rcv . I’m wondering if the swash plate is stuck. at this point I’d say check duty cycle of compressor with scanner or scope and if its max then id call a compressor
Hi Darren, It occurred to me that no one has brought up the Schrader valves on/in the service ports. It seldom happens, but it does happen, and that is one of the stems getting a bent tip or end. If that happens, the service gauges will not read correctly. This damage typically occurs from DIY types forcing cheap service adapts onto the fittings. I have had service port damage slip by me…