C15 engine fan won't shut off

It’s R12

 

Was I not suppose to use R12 the cab said good for trucks cars etc

 

Im pretty sure this is not correct, 2006 is a pretty late model to be running r12 in

All car mfgr switched in 1993, trucks took longer, but 13 years, im having a hard time with that

Which basically means youve mixed 2 completely different refrigerant styles, time to get a full flush and vac and recharge

 

Well oh #### now I feel like a complete idiot guess ima have to do that soon thanks

 

Sorry so I just checked i used R12a and the cab says it replaces R12 and R134

 

2000 and older on some trucks, but after that r134 only.

if you are using r12, then you have to have the system taken down, change the drier then flushed, brought down and recharged properly.

 

R12a is essentially propane, and youve mixed it with an unknown quantity of 134a, while it may work for a while, i question the wisdom of running it when r134a is significantly easier to come by (even though its not cheaper)

its possible if you have a leak now, you (or someone else) had a leak before and used the cans with the sealer in it. If thats the case, im going to guess thats whats messing up your fan switch and god knows what else.

Again, as said before, get a shop to do a full flush vacuum and fill of 134a