O20 FRONT SEAT HEATING NOT WORKING - Alfa - 156 - eLearn

With the ignition on, when the appropriate button on the front seats is pressed, the heating function does not come on.

Device operation is automatically cut out at a certain temperature by a thermal contact inside the device.

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	When the button on the seat is pressed, check that the led on the button comes on to indicate that the function has been activated.	Continue to Step 1	Led comes on	Continue to Step 3
1	CHECKING SEAT HEATING ELECTRICAL CIRCUIT	All OK	Problems met	Operation
	Check, in order: seat heating fuse services relay operation of the switch and led seat heating device power supply and earth See E3075 HEATED SEATS	Continue to Step 2	Component defective	Replace the component involved (if a fuse is involved, search for the cause of the problem)
		Continue to Step 2	Connections not correct	Restore the connections
2	CHECKING SEAT HEATING DEVICE	All OK	Problems met	Operation
	Check, in order: condition of thermal contact built into the device continuity of resistor connection condition of resistor filaments	Continue to Step 3	Connections not correct	Change the seat heating device
3	CHECK CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Search for the fault starting from another symptom'