condenser fan,diagram inside

[immajackuup]

Is this the correct way make condenser fan independent to a/c switch???

If so should I put 30amp fuse holder between condenser fan and a/c switch??

[jlevie]

No. The fan controls are already independent of the A/C. The temp switches will run the fan when the radiator is hot enough regardless of whether the A/C is on. The A/C over ride just causes the fan to come on with the A/C operation even if the radiator is below 91C.

Besides, the wire you propose to tap into can't supply enough current to run the fan.

If you are thinking of this as a means of controlling a hot running condition, it is the wrong fix. Find and fix the cause, don't just treat the symptom.

[immajackuup]

I'm trying to connect temp switch to my radiator electric fan and use condenser fan only when i turn a/c on.

[jlevie]

Lets see if I have this right. You have replaced the engine driven fan with an electric fan (which I hope is a 16" fan rated for at least 1800CFM). You want the condenser fan to operate normally with A/C and want the added fan to operate independently. In that case you need to add a second thermo switch & relay for the added fan. The thermo switch should operate just a touch higher than the thermostat rating. An 82-83C switch is what you want.

The thermo switch for the aux fan trips too high to be a replacement for the engine driven fan.

[immajackuup]

Lets see if I have this right. You have replaced the engine driven fan with an electric fan (which I hope is a 16" fan rated for at least 1800CFM). You want the condenser fan to operate normally with A/C and want the added fan to operate independently. In that case you need to add a second thermo switch & relay for the added fan. The thermo switch should operate just a touch higher than the thermostat rating. An 82-83C switch is what you want.

The thermo switch for the aux fan trips too high to be a replacement for the engine driven fan.

I have e36 lower temp switch already install 80c/88c.
No,what I'm trying to do is use factory temp switch with radiator electric fan and as for condenser only when I activate a/c.

http://www.pelicanparts.com/cgi-bin/smart/more_info.cgi?pn=64-50-8-372-039-M262&catalog_description=Cooling%20Fan%20Assembly%2C%20with%20Shroud%2C%20Located%20between%20Radiator%20and%20Engine%2C%20%33%31%38i%2Fis%2FiC%20%28%31%39%39%32%2D%39%38%29%2C%20%33%31%38ti%20%28%31%39%39%35%2D%39%39%29%2C%20Each%20%20%20%20

here the fan im getting^^

[jlevie]

With the aux fan and an electric fan behind the radiator there are two possible ways for those fans to work.

You can tie the added fan to the existing control system. In which case both fans will always operate at the same time. Understand that the thermo switch engages either the low speed relay or the high speed relay. That means that the added fan must be tied to both the low speed and high speed relay. Which in turn means that both fans will run at high speed.

The other possibility is to leave the existing controls alone and use the stock (99/91C) thermostat for the aux fan. Then add an 82-83C thermo switch and relay for the added fan.

[immajackuup]

With the aux fan and an electric fan behind the radiator there are two possible ways for those fans to work.

You can tie the added fan to the existing control system. In which case both fans will always operate at the same time. Understand that the thermo switch engages either the low speed relay or the high speed relay. That means that the added fan must be tied to both the low speed and high speed relay. Which in turn means that both fans will run at high speed.

The other possibility is to leave the existing controls alone and use the stock (99/91C) thermostat for the aux fan. Then add an 82-83C thermo switch and relay for the added fan.

I probably do that,should i change the fuse to 30 or 40amp?

[jlevie]

I don't know what the current draw is of the fan you intend to use. But the relays are only rated for 30a, as I recall. On high speed the aux fan draws close that that. If the new fan draws anything around 20a the combination will be too much for the relays & wiring.

You really should leave the aux fan and controls alone and install a separate thermo switch, relay, and fuse for the new fan. I'd also change the aux fan thermo switch back to stock.