AC/ heater switch

[Andy4639]

Well I have been burning up fan switches of late and finally decided it was time to change how the fan switch worked.

Factory the fan switch turns on the clutch on the first setting if the lever is in the AC position on the panel. It also starts the fan motor for blowing cold air into the cab. I had hooked a wire to a electric fan so that it would turn on also if the clutch was engaged and after several tries and several switches I decided to undo the electric fan wire. The switch just drew to many amps through it even though the electric fan was on a relay.

I have now a new fan switch and have the clutch and the electric fan on a relay under the hood. I have driven the truck now for 3 days running the AC and electric fan with no issue's and the fan switch isn't even warm anymore.
I used a 30 amp 12 volt relay from O-Rielly's auto parts.
Just some more info on my AC.
I took the truck over to a buddies shop after the power tour a few weeks ago and had him smoke test it. He told me to plug up around the condensor and radiator and fan shroud with foam to get a vacum going through the shroud. I went home and did as he instructed and I can't even begin to tell u what a differance it made in the cooling of the Cab temperature. On a 86 degree day like to day I was running 45 degree's inside the truck which while driving isn't hard to do, but where the good part is is while sitting in the drive through @ Wendy's for over 10 minutes the temperature stayed below 50 degree's inside the truck the whole time. Yes it did climb a little but not near what it would do before. It would have been 70 degree's before I did the foam. So if your having trouble with the AC not staying cool when parked try it it did wonder's for mine.