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Home >> Jeep >> 2009 >> Commander Overland, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 123 ((Front Control Module (FCM) - Electrical Diagnostics)) >> DTC Troubleshooting >> B10B5-Cabin Heater 1 Control Circuit High >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2009 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes 
(K360) PTC NO. 1 RELAY CONTROL CIRCUIT SHORTED TO VOLTAGE
(K360) PTC NO. 1 RELAY CONTROL CIRCUIT OPEN OR HIGH RESISTANCE
PTC NO. 1 RELAY
FRONT CONTROL MODULE (FCM)
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