Re: Heater problems.
I'm getting trouble code 22 also, if your using the flashing CEL to pull that. It's located near the thermostat housing, but I think there's two sensors there. The sensor that has two wires should be the one we need to replace, since that's supposed to be the one that sends signal to the PCM. The sensor with one wire sends signal to the gauge. HTH.
E.T.A.-Correction on the above post. The two wire sensor, located behind the thermostat housing, towards drivers side is the sensor that sends signal to PCM.
1994 ZJ, 3.5", 33" Trxus MT, HP D30 4.56, XJ D44 4.56 w/Detroit
2004 WJ Ltd. Stock QuadraDrive 235 70R17 Cooper AT3