schmiedel
NAXJA Forum User
- Location
- Mexico (Querétaro)
My XJ (1988 Pioneer with Renix 4.0 engine) had a bad water pump, so I replaced it and I thought it was time to get rid of my old fan clutch (the clutch was bad and the blades were all bent in different directions). As I had a 14" permacool fan ready to be dropped in, I decided this was the exact moment.
The previous owner had done some strange things with the old electric setup, the electric fan was connected directly to the AC compressor and to a switch, so when you turned on the switch, the AC compressor would also come in. I made a simple relayed setup so I could get both fans controlled using three different cases:
1. Temperature sensor on the radiator turns fans on.
2. AC is on
3. Switch inside the cabin (just in case something fails)
This setup is working flawless, the fans almost never go on under normal circumstances, just in heavy traffic and the temperature is stable enough for me. When the fans happen to turn on, they only work for about 1 minute as the permcool fan does a great job with 2950cfm.
Now my only problem is with the AC on; I don't like the fans to be working all the time; I've seen that on newer models, the AC turns the fan on and off depending on some reading (sensor, relay, sender?) it gets from the AC (I don't remember if it's a pressure reading or a temp reading). I believe the fans should be working all the time with the AC on if I drive slowly, but when driving on the highway it doesn't make sense to me. I would like to implement some system that guarantees the AC to work fine without forcing the fans to be on all the time.
Any comments about this?
Regards
The previous owner had done some strange things with the old electric setup, the electric fan was connected directly to the AC compressor and to a switch, so when you turned on the switch, the AC compressor would also come in. I made a simple relayed setup so I could get both fans controlled using three different cases:
1. Temperature sensor on the radiator turns fans on.
2. AC is on
3. Switch inside the cabin (just in case something fails)
This setup is working flawless, the fans almost never go on under normal circumstances, just in heavy traffic and the temperature is stable enough for me. When the fans happen to turn on, they only work for about 1 minute as the permcool fan does a great job with 2950cfm.
Now my only problem is with the AC on; I don't like the fans to be working all the time; I've seen that on newer models, the AC turns the fan on and off depending on some reading (sensor, relay, sender?) it gets from the AC (I don't remember if it's a pressure reading or a temp reading). I believe the fans should be working all the time with the AC on if I drive slowly, but when driving on the highway it doesn't make sense to me. I would like to implement some system that guarantees the AC to work fine without forcing the fans to be on all the time.
Any comments about this?
Regards
