Combines Hot wires on A C switch R 62

What kind of obstruction do you have in the air plenumIJ Has your friendly neighborhood mouse population taken up housekeeping in thereIJ Why dont you check it out and let us know what you findIJ Tom in MN

Is the 3 speed fan switch hot to the touchIJ If it is replace the switch we sell several switches a year. I've seen them so hot you had to hold them with a pliers to change them.

There is too much current draw on the switch from the fan motors for the switch too handle. Some of the aftermarket switches are a little better. Replacing switches has been a common pastime here over the years as well. Sando

This IS the problem. These sn's you are describing are pulling the compressor clutch as well as the blower motor through the switch!!! The red wire to the switch is power in; grey, brown, and orange are speed wires, the other wire, usually black, goes to the thermostat then the lp switch - then the clutch. Too much for the switch. Therefore,either remove the wire to the thermostat -"c" on switch- and put it on a SEPARATE wire to the fuse panel with a switch on it to power the clutch through the thermostat, or just run a switched ( hot when key is turned on) 12V wire to the thermostat . In this case remember you have to turn off the thermostat to turn off the compressor when you use the heater. (duh, or in some humid conditions such as harvesting in a downpour at 33 degrees ((F- Rolf -not C )) you might find it helpful) If you want another 200 RPM or so on a hot day out of the cab blower motor, wire in a relay so as when the switch is turned to high the high speed wire energizes a relay which connects a n 10 or 12 wire you run to the fuse panel to the motor. This takes all the load off the switch on high speed where the amps really flow. The early AirCooled units had a separate switch to the thermostat. Some genius decided they didn't need it any more. Small item but when your fan switch can be used for a cigar lighter on a hot day - it ain't so small huhIJ This small tip which takes only about 15 minutes will really make a big improvement. In fact we have one customer who's reattached testicals still have frostbite damage.

We have a '94 R-62 and serviced the a_c last season,hence know about the testicle problem.(A fella should put an ice pack down there to warm things up a bit!!!!) Seeya, silver aussie.

Mmmmm! harvesting at 33 degrees in a downpour just as well you put F after the 33 Tbran!!!!!

Installed a relay on the high range of the blower fan and it took care of the problem.

High side seems high, but I'm not sure with 134a. Here's a good a_c site.

What relay did you useIJ I will be converting the Sanden compressor on my R60 to R134A later this summer and would appreciate hearing any tips you can offer. This will be my first attempt at using R134 and I am not looking forward to it.

Tom, You may need a larger condensor for 134a. A lot of guys go with Duracool here. Have heard Duracool is common down under, would be interested to hear from Australian's on this subject.