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[5th Gen : 08+]: ac and rad fan not working

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Old Jul 15, 2023 | 02:17 PM
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imjmo
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Default ac and rad fan not working

Could be unrelated, but I think both stopped working the same time.

For the fan,
I've checked the hi and low relays and they are working
I've used a jumper on the relays to test the fan and it is working
I've replaced the engine coolant temperature sensor
I've also replaced the thermostat (due to a P0128)

For The AC
The clutch is not engaging.
The AC is charged and the AC compressor was replaced last year.

Any advice on what I should be checking for?

Is the AC Pressure switch the next thing to check/replace?
 
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Old Jul 29, 2023 | 06:26 PM
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I couldn't get any codes from my scanner, so took it to my local friendly mechanic that pulled this DTC.

B11CF: Rear Temperature Door Travel Range Too Small

This seems to indicate that I might need to replace the blend door actuator, but this doesn't seem to be the cause of the issues.
I get the rear defrost flashing sometimes when I start up the vehicle.

I tried to jumper the HVAC relay port and it doesn't make the condenser clutch engage
I've tested the condenser by connecting it to a power source directly and the clutch does engage

I'm starting to think this is an electrical issue. Is there a way to test whether it is the PCM or the HVAC controller? (or TPM or wiring?)


 
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