22 · Diagnostics

Climate control too cold

Make: Fiat
Model: Doblò Factory Service Manual
Year: 2000–2010
Section: Climate control › Climate control too cold

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Fault diagnosisClimate control too cold

CLIMATE CONTROL TOO COLD

The control button operates the passenger compartment air fan normally, but the temperature of the air is not correct.

1	AIR TEMPERATURE CHECK	All OK	Problems met	Operation
		Results of the tests
	Check the temperature of the air at the vents See Test 5040A	Continue to Step 9	Ambient temperature at the vents	Continue to Step 2
		Continue to Step 9	Temperature at the vents higher than desired	Continue to Step 3
2	SYSTEM PRESSURE CHECK	All OK	Problems met	Operation
	Connect the climate control system to the repressurizing equipment and check the system pressure See Test 5040B	Continue to Step 9	High and low pressure values below correct figures.	Continue to Step 6
3	SYSTEM PRESSURE CHECK	All OK	Problems met	Operation
	Connect the climate control system to the repressurizing equipment and check the system pressure See Test 5040B	Continue to Step 9	High and low pressure values below correct figures.	Repressurize the system Op. 5040A10
			High and low pressure values above correct figures.	Continue to Step 4
			Low pressure value correct, but high pressure value above correct figure (rapid compressor cycle as engine rpm increases)	Continue to Step 5
			Low pressure value high and high pressure value below correct figure	Replace the compressor Op. 5040A20
			High and low pressure vaules do not alter when the air conditioning is activated.	Replace the compressor Op. 5040A20
4	CONDENSER FAN CHECK	All OK	Problems met	Operation
	Check that the fan cools the condenser correctly.	Continue to Step 5	Electric fan defective	Replace the fan Op. 5040C30
5	CIRCUIT LOADING CHECK	All OK	Problems met	Operation
	Check that the system loading is not excessive.	Continue to Step 7	System loading excessive.	Restore the correct loading Op. 5040A10
6	COOLANT CIRCUIT OBSTRUCTION CHECK	All OK	Problems met	Operation
	Check that the pipes and the filter are not obstructed.	Continue to Step 8	Pipe obstructed	Replace the pipe
	Check that the pipes and the filter are not obstructed.	Continue to Step 8	Filter obstructed	Replace the filter Op. 5040A44
7	CONDENSER CHECK	All OK	Problems met	Operation
	Check that the condenser is not blocked.	Continue to Step 8	Condenser blocked	Replace the condenser
8	EXPANSION VALVE CHECK	All OK	Problems met	Operation
	Check the operation of the expansion valve.	Continue to Step 9	Expansion valve defective	Replace the expansion valve Op. 5040B30
9	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'

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Parts & tools for this job For 2000 Fiat Doblò

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