Quote:
Originally Posted by otto huber
I saw lots of bubbles in the sight glass, so I went ahead and add 8 oz. of R12 to the system. After adding the R12 the vent air wasn't much colder and there were still a lot of bubble activity in the sight glass. I put my hand to the low pressure hose and it wasn't cold, more like ambient temp. The high side was very hot and I then noticed that the auxiliary fan wasn't running, but it has worked in the past. After shutting down the engine, I put a jumper on the aux fan and it worked, could it be a relay?
Does the aux fan affect vent temps?
Does anyone know the book time to discharge a system, do a leak test and then refill? Can the recovered R12 be used again, or does it have to be fresh?
I have 14 oz. of R12 left, and I'm not sure if I want to continue the guessing game.
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Absolutely the aux fan needs to run. A common problem is the thermal switch on the drier goes bad, and the fan won't run. You could either connect the 2 wires together so the fan runs whenever the ignition is on, or replace the switch. No need to discharge the system for this. The other option is to purchase one of my relay mods that runs the fan whenever the compressor clutch is powered up. As far as recovering the R12, you need to take it to a shop. They will recover the refrigerant, and credit it back to you when you have it recharged. You can then do a leak check and the necessary repairs.