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Old 12-22-2011, 05:06 AM
My Jeep: 2007 5.7L WK
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Air conditioning heating problem

Troubles with Euro WH HEMI MY2007 (bought December 2006).

A month ago, heating wouldn't work. No warm heating, even though setting the heater to "HI" and using manual heating (no auto).

Service technician told me it could be due to:
- faulty infrared sensors, although no error from diagnostics
- faulty heating radiator (needs dash removal = $$$$)
- Coolant leakage

As the coolant level was between the MIN and MAX level, the level was refilled up to MAX.

The heating started working again!

However still there's something strange:
- In the first minutes of usage, the air flowing is very hot (HI & manual)
- Once hot enough, switching the temp to 22/24 cools down the air temp
- When switching again to HI (& manual) the air will not get hot anymore...

- The coolant level did not change (no leaks)
- As the infrared sensor should be inactive when in manual mode, it shouldn't be taken in account.. correct?

What can I try? Maybe some air somewhere? Or could the heating radiator be defective?

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