22 · Diagnostics

Climate control not cooling

Make: Fiat
Model: Doblò Factory Service Manual
Year: 2000–2010
Section: Climate control › Climate control not cooling

‹ Prev The electric fan does not work at the speed selected Next › Climate control too cold

Fault diagnosisClimate control not cooling

CLIMATE CONTROL NOT COOLING

The control button operates the passenger compartment air fan normally, but this air is at the outside temperature and has not been cooled.

1	BELT CONDITION CHECK	All OK	Problems met	Operation
		Results of the tests
1.2 8v	Check the condition of the compressor drive belt and make sure the tension is correct.	Continue to Step 2	Belt defective	Replace the belt Op. 1092D10
1.2 8v		Continue to Step 2	Tension incorrect	Restore correct tension Op. 1092D14
1.9 DIESEL	Check the condition of the compressor drive belt and make sure the tension is correct.	Continue to Step 2	Belt defective	Replace the belt Op. 1092G10
2	CHECK ELECTRICAL CIRCUIT	All OK	Problems met	Operation
	Check, in order: Compressor fuse Continuity and insulation of climate control electrical circuit See E6020 AIR CONDITIONING	Continue to Step 3	Component defective	Replace fuse (and search for the cause of the problem)
		Continue to Step 3	Connections not correct	Restore connections
3	CHECK WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket and carry out active diagnosis of the compressor relay.	Continue to Step 4	Relay faulty	Replace the relay
4	CLIMATE CONTROL COMPONENTS CHECK	All OK	Problems met	Operation
	Check, in order: compressor activation control 4 stage pressure switch See Test 5040BA electronic thermostat	Continue to Step 5	Compressor control faulty	Replace the compressor control Op. 5040A22
			4 stage pressure switch faulty	Replace the pressure switch Op. 5040B14
			Electronic thermostat faulty	Replace the electronic thermostat Op. 5040B22
5	CHECK COMPRESSOR ELECTRO-MAGNET COUPLING	All OK	Problems met	Operation
	Check the operation of the compressor electro-magnet coupling. In particular, check the resistance, coil, supply and earth.	Continue to Step 6	Electro-magnetic coupling malfunction	Replace the compressor Op. 5040A20
6	SYSTEM PRESSURE CHECK	All OK	Problems met	Operation
	Connect the climate control system to the repressurizing system and check the system pressure See Test 5040B	Continue to Step 7	The pressures do not alter much when the compressor is switched on	Replace the compressor Op. 5040A20
			The high and low pressures vary, but do not reach the correct values.	Repressurize the system Op. 5040A10
			Evaporator dirty	Replace the evaporator Op. 5040C10
7	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present		Fault persists	Search for the fault starting from another symptom'

‹ Prev The electric fan does not work at the speed selected Next › Climate control too cold

Parts & tools for this job For 2000 Fiat Doblò

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