R32 A/c Not Working

[Rossman]

vehicle:

93 r32 gtst

today i was messing around with my air conditioning, trying to get it working cauz its so damn hot! found fuse 8 in the fuse box under the dash to be blown... was a 10amp fuse. replaced it with a new 10amp fuse, started the car and turned the a/c on. a/c compressor kicked in, then stopped! checked fuse again...BLOWN :-O

checked out the wiring to a/c pressure switch...connector all dirty and dodgy looking. cleaned the connectors up and checked continuity thru the connector, was all ok.

had no 10amp fuses left so replaced fuse 8 with a 15amp fuse. for about 25 mins the a/c worked perfectly until a very slight burning smell started to form somewhere in the engine bay (no smoke visible) then as expected the a/c compressor stopped and the 15amp fuse was blown!!

thats where i am at now, if any one has any sugestions or knows the problem please feel free/help me!

thankyou

-ROss.

[noone]

Sounds Like the coil on the compressor clutch is toast try searching the diy section as there is a good post on this there, hope u havn't cooked the wiring to much with that 15A fuse?!?

[r32woohoo]

yeh the compressor clutch coil is gooorrne...

coz the same things happening with my car.

im getting the coil replaced. theres a DIY about it in the Faq section

[Rossman]

thanks for your help guys....

where to get the coils re-done and how much?

im in bris

cheers

- Ross

[Rossman]

ok cheers guys,

i had the coil re-wound by

RAPID REWIND

Brisbane QLD (behind sailsbury wreckers)

3875 2498

for those who need it in the future.

anyway, a/c working fine now!! only one prob:

radiator/thermo/aux fan not cutting in.

fan does not even work when engine is at operating temp.

all wiring to fan is fine

relay is fine

fan is fine

fan will work when correct switches in relay are bridged.

i self tested my a/c system with the diag mode

logged code 23 - Water temperature sensor

so im thinking new sensor and it'll be fine?

water temp gauge works by the way

any thoughts be greatly appreciated.

cheers

- Ross

[BH_SLO32]

ok cheers guys,

i had the coil re-wound by

RAPID REWIND

Brisbane QLD (behind sailsbury wreckers)

3875 2498

for those who need it in the future.

anyway, a/c working fine now!! only one prob:

radiator/thermo/aux fan not cutting in.

fan does not even work when engine is at operating temp.

all wiring to fan is fine

relay is fine

fan is fine

fan will work when correct switches in relay are bridged.

i self tested my a/c system with the diag mode

logged code 23 - Water temperature sensor

so im thinking new sensor and it'll be fine?

water temp gauge works by the way

any thoughts be greatly appreciated.

cheers

- Ross

Ross,

The auxiliary fan is not operated by the A/C system but simply the temperature switch in the bottom of the radiator. It will only kick in once the water temp gets to about 96 degs from memory. Also the water temp sensor you are talking about is not the engine temp sensor but the sensor at the back of the inlet cam cover connected to a coupling wrapped around the heater tube connected to the heater hose. It has a 2 pin connector.

Cheers

Edited February 13, 2007 by BH_SLO32

[Rossman]

thanks BH_SLO32, can u please tell me wire colours and a picture if possible of the engine temp sensor as im not too sure where to look for it.

you think that sensor is the failed sensor that the a/c diag mode is telling me about?

thankyou.

- ROss.

[BH_SLO32]

thanks BH_SLO32, can u please tell me wire colours and a picture if possible of the engine temp sensor as im not too sure where to look for it.

you think that sensor is the failed sensor that the a/c diag mode is telling me about?

thankyou.

- ROss.

Yep, photos attached. Sorry I didn't really get a shot of the temp switch in the car but I took a photo of a spare one I had lying around.

Cheers

[Rossman]

Thanks for your help ben and for the pics too.

unfortunately, although my temp sensor is showing a code in diag mode, i am thinking that it is unrelated to the problem i am having with my radiator fan not operating.

today i removed my temp sensor loacted at the bottom drivers side end tank of radiator and tested it. at ~96 degrees celcius i had perfect continuity thru the sensor to the 2 pins at the end of the connector.

in the fuse box in engine bay i tested all 4 ports for relay and all are ok. wiring and ground circuits are all ok.

all i can think of now is that the rad fan is not supposed to come on when the a/c is turned on as i have read in another thread where some clever fella has put a DIY on installing a diode so the fan will come on with the a/c.

thoughts on this please.

thanks,

- ROss.

[RB30-POWER]

it only comes on when the water is 96degC then.

that is the way its meant to operate, only as a failsafe so to speak if the coolant temp rises out of its standard range, which is between 76.5 and 90degC on RB engines, to aid engine cooling.

if your retrofitting the system, it will be an advantage to switch the fan on anytime the ac switch is engaged, it will lower the head pressures and make it more efficient.

[BH_SLO32]

Ross,

The temp switch for the climate control is not related to your thermo fan operation as you stated. In the past when I have installed thermo fans I replace the temp switch in the radiator with a unit that switches on at about 85 degs and turns off at 83 degs. I now also install an incabin switch just in case the temp switch fails while driving (has happened with my dads R32).

I am just about to experiment with a jaycar temp switch with adjustable hysterisis (adjustable "on" and "off" temp) for about $30. I will be testing it on my dads R32 which has dual 12" thermos which I have wired up with the factory thermo fan. Currently he is having issues with the temp switch (again) so this jaycar kit hopefully will offer better reliability. At $30 I don't have much to lose.

Cheers

Edited February 14, 2007 by BH_SLO32