running hot, fan not running unles heat or a/c is on

[ILLKing]

Hello all, I swapped in a 160 thermostat on my 94 and now it is actually running hotter. I noticed that the fan does not come on unless I turn on the a/c or heat. Then temp hand went a hair pass the small black line right before the red line at 250 and I shut her off. Any ideas Whats going on? Would really appreciate any input and help. A big thanks to Steve for helping me with getting coolant through the system

 

[bluesrt]

possible coolant temp sensor i would check first

 

[ILLKing]

I'll jump on it. Hopefully thats the issue. Before the change, it was running at 200-205. Maybe I destroyed the sensor? Or didn't get all of the air out?

 

[WDW MKR]

If the issue popped up immediately after you changed the thermostat, my money would be on an air pocket.

 

[bluesrt]

if you didnt get all the air out, you wont have a heater at idle,wich if you now have a overheat fault now,thats it, what wdw mkr states

 

[Ginja]

I had a similar issue on my 97, found that the relay for the fan was toast, A/C overides the relay and causes the fan to run whatever, turn the AC off, no fan... I only noticed when I switched the A/C off a few minutes before arriving home with the fuse removed from my Roe fan control kit - just saw the temperature gauge go mental as I arrived home. New relay, no problems for me, but your issue may be different. The broken relay was noticeably melted on the underside when removed from the fuse box.

Mark

 

[ILLKing]

I'll take a look at that when I pick her back up from storage early friday. Thanks