Just a follow up to add some more confusion.

I started mine up this morning with AC, defrost off. Cooling fan was off. The car idled for about 5 minutes as I watched the temp slowly climb. It got to about 190 and the thermostat opened. Temp reading fell back to 183.
OK. The cooling fan still hadn't come on. Now I'm confused.
Another 5 minutes or so and the temp made it up to around 196-198.
THIS is when the cooling fan kicked on.

So. The moral here. I don't have a clue what the specs are as far as how the cooling fan works in regards to temps.
I just know mine works and the engine operates a the correct temps.

JSK. Sorry, I doubt this is any help to you and your AC issue. Just thought it would give you something to compare to.

 

Same here. HVAC off, coolant temp 81* when I started it. Engine ran for just over 10 minutes, reached 197*-198*, then the fan kicked on.

 

So it operates like the 2,2/2.4, but at 197 instead of 219. Question is: when does it turn off? 2.2 turns off at about 180.

 

I don't believe mine ever turns off until I shutdown the engine. It's always on when I pull in and park at the end of a drive.
My temp never drop back to 180 while the engine is running, so I don't know about that either.

 

RJ - thanks for that link! Good relevant reading.


FMG & RJ - thanks for the Data Logging Project in helping me out!!


I started her up, a/c switched ON, took about 10 minutes (in fact, I'm in a hurry so after 5 minutes staying at 185 I bumped up the RPMs to 2,400). Got to 199 and I looked and the fan IS spinning slowly. RMPs back to idle and when the temp dropped below 196 the fan stopped again (even with a/c button ON). A/C compressor never engaged.


I hoped that the fan would NOT turn on so it'd be a safe bet to buy a fan assy (forum posts indicate that the fan and logic assembly are only sold as a single unit).


But, given that the fan does NOT turn on with a/c ON, maybe it's a safe enough bet.


(sounds like all you guys show a fan running if the a/c is ON, no matter what coolant temp is?)


Again, my sincere thanks!

 

I think somebody found that you can get just the module. I thought someone gave a link.

https://www.chevyhhr.net/forums/hhr-...s-50941/page3/

 

Cooling fan should turn on any time the AC is turned on.
I wonder if your control switch on the dash is bad ? That switch turned to AC or defrost should activate the relay, which engages the compressor and fan.
You said in an earlier post that you could jump the relay and get the compressor to engage, correct ?

Might be time to pull the waterfall and check the AC control switch.

 

Here are some fuses and relays to check. They are related to AC or cooling fan. Don has already listed some, but I'll give you the whole list, from the 2010 owners manual.

At the BCM
fuses 10 and 16; relay 13

Underhood fusebox
fuses 9, 22, 40; relays 15 and 50

A few differences on my 2009 - fuse 40 is moved to 7; relay 50 is empty. I haven't looked at the BCM.

That being said, many electrical motors have thermal overload shutoffs, does anybody know if the cooling fan motor does?

 

That's right - Don listed all those inputs I just asked about way back on page 2 or so! i DID check those fuses/relays he suggested, and I just went out to check the others you mentioned.
BCM relay is at #30 (not 13 as Owner Manual says), but I don't have any other of those relays to swap out (for testing). Don't know how to test a relay - I guess youtube is in my future.
Fuse #9 is a diode - another youtuber, and underhood relay #50 is empty on my car (a 2010 SS 5-spd). Could not find any other written items on fuse panel with related parts. So except for that BCM relay and the diode, I think they're all good. Will search for "waterfall removal" and try to test that/those switches (a/c and recirc, right?).


Again, thanks to all.

 

Owner Manual has fuse blocks listed.

Waterfall; put fingers in A/C vents, yank.