Acura Repair Questions? Ask a Mechanic for Answers ASAP
hello I can try to help you with this
I am currently unable to use the phone service for this .
you say that the A/C compressor " does " turn " ON " ?
and do you have air blowing from the dash vents ?
I will assume that the blower is working .
okay and it is blowing warm air and the air conditioning compressor is turning on , Correct . Does the Air Conditioning condenser cooling fan turn on also ?
okay , the fan on the radiator/condenser in the engine compartment is turning on ?
If you are certain that it has the correct refrigerant charge in the A/C system it is most likely that the Heater valve is stuck in the " hot " position even though you are setting it for " cold " . There is a valve on the heater case that stops engine coolant flow through the heater core when the A/C is on
to confirm this you can clamp off the to heater hoses at the firewall and continue running the car for 15 or 20 minutes and see if the air turns cold
another quick check is to check the temperature of the " suction " hose . it is the large hose in the illustration . When the A/C is on this hose should feel quite cold .
I think you need to confirm that the front " clutch " Plate on the compressor is " locking and turning
is the A/C suction hose cold ?
can you connect onto the service ports to check the pressures . At this point it appears that your compressor is defective . If the compressor is locked and rotating you should see 20-30 psi on the low side and 150 to 200 psi on the high side . if the pressures are equal ( 75 psi ) that indicates that there is no " pumping " action being generated by the compressor .
you need to put a service , manifold gauge set on and check the system pressures . this is critical information required in order determine your problem at this point .
you need to put a gauge set on and tell me what you are seeing for pressures in order for me to help you further . I need specific information at this point . if the suction hose is NOT cold , the system is either empty or the compressor or expansion valve is defective .
certainly . you can ask another technician but what you are saying is happening is not a pressure switch problem
If the pressure switch was at fault the A/C compressor would not turn on .
there is no way to know that your compressor is fine with out confirming that the operating pressures are what I listed previously . before going any further you need to know the system pressures .
okay . thanks
okay so when you turn on the car and the A/C and the blower set to hi . Do you get full blower fan from the dash vents ?
check fuse # ***** and # ***** in fuse panel under the dash
check fuse #30 , 12 and 21 under the hood
do you have a test light ?
okay , i understand that the fuses are " good " but did you check both sides of the fuses with the key on and A/C turned on ( preferably with the engine running )
find the relay under the hood . check for voltage on terminal 4 if there is power tere jumper #2 and 4 . see if the compressor turns on
can you find the A/C relay in the junction in the engine compartment
remove the relay and use the test light to check for power . there should be power to one terminal with the key " off "
okay . if you put the rely back in do you here it clicking on and off with the A/C button ?
does this look like your relay ?
are there 2 pins that are " big " ?
okay . with the engine running , A/C on . use a piece off wire and bridge the two large pins , 1 & 2. does the clutch turn on ?
when you put a wire into those 2 receptacles of the relay box the A/C compressor does not turn on ? and the 2 pins both light up with your test light ?
are you pushing a " jumper " wire down into the receptacles ( sockets ) in the relay box ?
you will need to leave the jumper in and check with your test light at the A/C compressor connector
only one wire at the compressor clutch should light up on your test light .
the connecter on the front of the A/C compressor on the motor
okay . yes the wire at the A/C compressor needs to light your test light . Does it ?
yes the there should be power down to your A/C compressor
you will need to gain access to it and check it
here is a diagram of the compressor
NO .. that relay needs to power the A/C compressor on . When you jumper that circuit at the relay box . that sends power to the A/C clutch . if you jumper the relay sockets and the compressor does not engage then either the wire going between the relay box and the compressor has a break in it or the compressor clutch coil is defective . that is why you need to see if there is power at the A/C clutch connector . look up from underneath the car . you should be able to get to the A/C connector easily from under the car
i sent you a picture of the a/c compressor and the connector .
the connector that is right on the front of the A/C compressor
okay and the other wire ? only one wire can have power the other wire needs to ground . if that is the case then you have a faulty clutch coil .
okay so with the one wire lit up and if you start the engine and the compressor does not lock up and run then that confirms the fault is with your compressor .