ac fan wont turn on.

[mikejax21]

the fan on my ac dryer wont come on on my 95 q45. it was missing a fuse in the fuse box but when i put one in i still didnt get any thing.

[maxnix]

There is a fan on your AC dryer? Can you elaborate?

[mikejax21]

i guess its the fan on the condenser then its the ac component thats up front with the radiator i know what it is i dont know what its called lol

[maxnix]

AC condenser fan. It does not run continuously but only when it has to.

[mikejax21]

ok well ill have to watch and see if it comes on then

[YELLOW S13]

Should come on when you have ac on

[mikejax21]

i think its a bad relay or fan motor

[Infinitiguy19]

Can you guys please take the time to read through the service manual?

The fan comes on/stays on with the IGNinition switch "ON" or "Start" position. And that's only if the pressure in the Air Condition system exceeds a specified value. Or if the temperature of the engine as reported by the thermal transmitter reaches a specified temperature. The ECU will ground one or both relays till the sensor reports a lower temperature to the ECU.

So as I said before you may have a 1990-1993 Q45 ECU, A NICO ECU (modified 1990-1993 Q45 ECU) or a defective thermal transmitter circuit.

You can rule out the relays by using a real Nissan Consult 2 or OBD Scan Tech Nissan (With the proper cable of course).

[YELLOW S13]

In my case I would believe relay. I have replaced the thermal transmitters (temp sensors) and stock no altered ecu. So apprently need to check the relays. Thank you good sir

[YELLOW S13]

In my case I would believe relay. I have replaced the thermal transmitters (temp sensors) and stock no altered ecu. So apprently need to check the relays. Thank you good sir