99 civic 100k miles. I have a weird AC problem. i filled the AC few months back since it wasnt blowing cold air. and now it stops working while its on and then turns back on by itself. and then sometimes it wont even turn on and it will start working by itself. ANy idea and what to look for or what could fix this problem. plz advise.

 

check for leaks and problems with thermostat

 

FIrst off R134a systems DO NOT like to be overcharged. When that happens they blow seals. To truly figour out where the **** is going is to put some dye in it and have someplace reputible fill it back up. Also, if it jsut randomly stops working as well, do you hear the compressor kicking on? If you do then it could definately be a waterpump or thermostat issue.

 

Worked on a CL that had this same issue and it ended up being the water pump, thats why i brought that up.

 

what does this has to do with Waterpump or thermostat ? sorry not that knowlegeble about this things.

 

Think of it like the human body starving. IT shuts down things that aren't nessecary to keep it running. In regards to the A/C shutting down, that is due to the fact it is probally leaking coolant somewhere and overheating somewhat

 

Check for shorts in the AC wiring circuit.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1337 Si &raquo;</TD></TR><TR><TD CLASS="quote">Think of it like the human body starving. IT shuts down things that aren't nessecary to keep it running. In regards to the A/C shutting down, that is due to the fact it is probally leaking coolant somewhere and overheating somewhat
</TD></TR></TABLE> omg lol. We are talking about engines. So you are saying that if I have a system thats taking up all the battery, my car will just shut everything off????

Please think about what you are saying and go read your autoshop book ( electrical system chapter)

 

Lol oh hush, I was talking in regards to the cooling system.

 

Have you checked the wiring in the HVAC unit? Sometimes even if the light is on when you press the AC switch, if the wiring is bad, it won't turn on the ac clutch.