23 · Diagnostics

Climate control not heating

Make: Fiat
Model: Panda Factory Service Manual
Year: 2003–2012
Section: Climate control › Climate control not heating

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Fault diagnosisClimate control not heating

CLIMATE CONTROL NOT HEATING

Manual Air Conditioning

The climate control is working properly and sends air according to the preset flows but this air does not guarantee the required heating.

0	PRELIMINARY CHECK	All OK	Problems encountered	Operation
		Results of the tests
	Check that the engine coolant level is within the preset levels and that the refrigerant fluid circulates correctly in the system	Move on to Step 1	Engine coolant level too low.	Restore the correct level checking that there are no leaks from the system.
		Move on to Step 1	Refrigerant fluid not circulating correctly (thermostatic valve does not open sufficiently)	See fault diagnosis for thermostatic valve
1	CHECK ON CORRECT CLIMATE CONTROL SYSTEM OPERATION	All OK	Problems encountered	Operation
	With the engine on, the compressor off, in the manual function with the temperature knob at the maximum hot position. Select the recirculation button the the closed position and set the fan speed to 3 and front ventilation distribution. Using the diagnostic equipment check that the engine temperature reaches at least 70 °C	Move on to Step 4	The temperature of the air coming out of the vents is not the desired one	Move on to Step 2
2	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Connect the Examiner diagnostic equipment and check that there are no errors at the engine temperature sensor	Move on to Step 3	Error at the engine temperature sensor	See fault diagnosis for engine temperature sensor
3	CHECK ON CORRECT OPERATION USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Check that the air mixture motor errors do not persist (after the self-learning procedure, if necessary)	End of diagnosis	Left air mixture actuator error	Replace the left air mixture motor Op. 5040D84 AIR CONDITIONING LEFT HAND AIR MIXER FLAP CONTROL MOTOR - R.R
		End of diagnosis	Right air mixture actuator error	Replace the right air mixture motor Op. 5040D86 AIR CONDITIONING RIGHT HAND AIR MIXER FLAP CONTROL MOTOR - R.R
4	CHECK ON CORRECT OPERATION OF KINEMATIC MECHANISM	All OK	Problems encountered	Operation
	Check that the climate control flexible cables/kinematic mechanisms are working correctly	End of diagnosis	Operation of climate control flexible cables/kinematic mechanisms not correct	Replace the control unit and flexible transmission cables

Automatic Air Conditioning

The climate control is working properly and sends air according to the preset flows but this air does not guarantee the required heating.

0	PRELIMINARY CHECK	All OK	Problems encountered	Operation
		Results of the tests
	Check that the engine coolant level is within the preset levels and that the refrigerant fluid circulates correctly in the system	Move on to Step 1	Engine coolant level too low.	Restore the correct level checking that there are no leaks from the system.
		Move on to Step 1	Refrigerant fluid not circulating correctly (thermostatic valve does not open sufficiently)	See fault diagnosis for thermostatic valve
1	CHECK ON CORRECT CLIMATE CONTROL SYSTEM OPERATION	All OK	Problems encountered	Operation
	With the engine on, the compressor off, in the manual function with the temperature knob at the maximum hot position. Select the recirculation button the the closed position and set the fan speed to 3 and front ventilation distribution. Using the diagnostic equipment check that the engine temperature reaches at least 70 °C	End of diagnosis	The temperature of the air coming out of the vents is not the desired one	Move on to Step 2
2	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Connect the Examiner diagnostic equipment and check that there are no errors at the air mixture actuators that there are no faults in the engine temperature sensor	Move on to Step 3	Short circuit error at the air mixture actuators	Move on to Step 3
			Implausible error at the left actuator	Replace the actuator Op. 5040D84 AIR CONDITIONING LEFT HAND AIR MIXER FLAP CONTROL MOTOR - R.R
			Implausible error at the right actuator	Replace the actuator Op. 5040D86 AIR CONDITIONING RIGHT HAND AIR MIXER FLAP CONTROL MOTOR - R.R
			Error at the engine temperature sensor	See fault diagnosis for engine temperature sensor
3	ELECTRICAL CIRCUIT CHECK	All OK	Problems encountered	Operation
	Check the continuity/insulation of the electrical connection for the air mixture actuator(s)	Move on to Step 4	Electrical connection broken or not insulated	Restore the continuity/insulation of the electrical connection.
4	CHECK ON CORRECT OPERATION USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Check that the air mixture motor errors do not persist (after the self-learning procedure, if necessary)	End of diagnosis	Left air mixture actuator error	Replace the left air mixture motor Op. 5040D84 AIR CONDITIONING LEFT HAND AIR MIXER FLAP CONTROL MOTOR - R.R
		End of diagnosis	Right air mixture actuator error	Replace the right air mixture motor Op. 5040D86 AIR CONDITIONING RIGHT HAND AIR MIXER FLAP CONTROL MOTOR - R.R

‹ Prev Climate control too cold Next › Climate control recirculation not working

Parts & tools for this job For 2003 Fiat Panda

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