Sorry Pizza Guy, I’m new and apparently my first post didn’t go up. Here is the story. A month ago car battery died at a store. Jumped it and drove it home. Alternator wasn’t charging, smelled fried. Replaced battery and alternator. At the same time I decided to
replace water pump, thermostat, pulleys, belt, hoses and radiator. Started car all good. Then AC decided not work within a few days. Diagnosed a bad AC clutch. Replaced AC compressor, drier, and expansion valve. Fixed AC for a day. Then AC intermittently wouldn’t work. Only while driving would it blow cool air, at idle warm. Checked under hood cooling fan not turning no matter whether AC on or engine temperature getting hot. Replaced both the fan and fan controller still no go. I saw a post about the RCM solder and relays. Figured I’d try it. Disconnected battery pulled RCM did the resolder on connections, cleaned relay contact points, cleaned all fuse connections. Reinstalled it and started car. Worked perfectly on 10 mile drive, AC ice cold engine temps stayed in the midrange on gauge. Let car sit idling in driveway for 15 minutes AC nice and cold cooling fan running. Then this morning upon start up, turn on AC no cooling fan, engine temperature increased fan came on for 2 seconds shut off. Drove it AC worked engine temp normal. Stopped car at traffic light engine warmed up AC stopped blowing cold. Drove away got a mile and engine temp dropped AC blew cold until I stopped for another traffic light. Got home let idle cooling fan will not kick on no matter what the engine temperature is or with AC on. Is it possible the RCM is just bad? I’m running out of ideas. Thanks, Sal