H3 Alpha - Stock Condenser Fans
#11
05-21-2021, 08:40 AM
If ecu was replaced, and not flashed with the right program (the US) it wont run the fan. The SA model program has the fan tables edited.
basically, fan 1 runs at 102, fan 2 at 107 celcius and fan 1 runs at ac pressure above 170 psi, fan 2 above 270 psi. Fans turn off at any speed above 60-70 kph.
If you have access to hptuners (a tuner), tuning the fan is very easy .
It would be normal for the fan not to run immediately with ac. It takes a few ac compressor cycles to build pressure in the system to 170 psi. As for without ac, the alpha wont go to 102 just idling.
basically, fan 1 runs at 102, fan 2 at 107 celcius and fan 1 runs at ac pressure above 170 psi, fan 2 above 270 psi. Fans turn off at any speed above 60-70 kph.
If you have access to hptuners (a tuner), tuning the fan is very easy .
It would be normal for the fan not to run immediately with ac. It takes a few ac compressor cycles to build pressure in the system to 170 psi. As for without ac, the alpha wont go to 102 just idling.
After driving the car 20km's with the AC on yesterday, I quickly got out to check if the fans were on, when idling in traffic and they were not.
I think I need to firstly try and check to make sure the wiring looks ok / ensure the fans are working first.
If they are working, then I will check on the flashing. It was done by a Hummer specialist, but this is the Wild Wild East so who knows if they did it correctly!
#12
05-21-2021, 09:01 AM
If ecu was replaced, and not flashed with the right program (the US) it wont run the fan. The SA model program has the fan tables edited.
basically, fan 1 runs at 102, fan 2 at 107 celcius and fan 1 runs at ac pressure above 170 psi, fan 2 above 270 psi. Fans turn off at any speed above 60-70 kph.
If you have access to hptuners (a tuner), tuning the fan is very easy .
It would be normal for the fan not to run immediately with ac. It takes a few ac compressor cycles to build pressure in the system to 170 psi. As for without ac, the alpha wont go to 102 just idling.
basically, fan 1 runs at 102, fan 2 at 107 celcius and fan 1 runs at ac pressure above 170 psi, fan 2 above 270 psi. Fans turn off at any speed above 60-70 kph.
If you have access to hptuners (a tuner), tuning the fan is very easy .
It would be normal for the fan not to run immediately with ac. It takes a few ac compressor cycles to build pressure in the system to 170 psi. As for without ac, the alpha wont go to 102 just idling.
After driving 20k's or so yesterday with the AC on, I checked to see if the fans were on when idling, but they were still not.
I guess I need to try the following;
1 - Check the fan wiring and test the fan to check it is still working by hooking it up to another power source.
2 - If step 1 doesn't resolve the issue, I will check with the Hummer specialists who flashed it. It was so say done by experts, but this is Wild Wild East.... so who knows!!\
Thank you
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