Question(1) Occasionally my vent air blower will stop (1-2 sec) and restart automatically. Once or twice the A/C compressor has shut down (clutch disengaged?). How can I fix this?
(2) My Disco A/C is cool but not cold. I checked the suction pressure of my compressor and found it to be 45 psig with front air only. With both front & rear, the pressure jumps to 55 psig. With rear only, 65 psig. Can I get the A/C cooler? Is the pressure changes normal?
AnswerHi Chris,
you have two problems here. The first is the A/C Heater blower control. I have this problem in my '95 Disco. I was told to replace the control unit and it should be resolved. I am considering to buy this used from an auto wrecker...about $75. OEM would be close to $400
The second problem is your compressor. We share the same compressor and I was told that the switch inside the compressor eventually burns out. There is no way to replace this switch and the entire compressor must be purchased (about $1000).
This summer, while in Miami, I had an electrician by-pass the switch and feed 12 volts directly to the compressor motor. My AC was fantastic...however, I had to open the hood to 'hot wire' the AC to work. Only solution is to purchase a new or used compressor. ouch.
If you are in the states, you might be able to resupply the AC coolant with R134a. Most auto parts shops have these kits. I was told that as the switch fails, the compressor slowly leaks out the R134. Advance Auto can set you up the kit you need to refill the R134a and I suggest you consider a used replacement from a reputable wrecker. Usually comes with 30 day to 1 year warranty.
Best of luck,
JohnMc
