23 · Diagnostics

Climate control air flow irregular

Make: Fiat
Model: Panda Factory Service Manual
Year: 2003–2012
Section: Climate control › Climate control air flow irregular

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Fault diagnosisClimate control air flow irregular

CLIMATE CONTROL AIR FLOW IRREGULAR

Manual Air Conditioning

The flow of air sent by the fan motor in the passenger compartment using the manual speed control is not sufficient; it does not correspond to the speed set.

1	AIR DUCTS CHECK	All OK	Problems encountered	Operation
		Results of the tests
	Check that the air ducts are intact and the vents are not blocked and are correctly positioned in the opening	Move on to Step 2	Air ducts or vents obstructed.	Restore the operation of the air ducts and the vents removing any material causing an obstruction.
2	CHECK ON CORRECT OPERATION OF SPEED SELECTOR	All OK	Problems encountered	Operation
	Check that the fan is working at the maximum speed: if it only works at the maximum speed, the resistor should be replaced Check whether the resistor thermal fuse is broken by measuring the electrical continuity at the thermal fuse securing points..	Move on to Step 3	Failed operation of speed selector	Replace the ceramic resistor
3	CHECK ON CORRECT OPERATION OF FAN	All OK	Problems encountered	Operation
	Check whether the electrical wiring connections are loose: disconnect/reconnect the connection to the engine mounting. Check that it rotates at all speeds by activating them using the switch. If it does not rotate at the maximum speed, check the vehicle fuse. If the defect persists, before replacing it, provide a direct battery supply and check that it rotates at maximum speed.	Move on to Step 4	Electrical connections loose	Renew the electrical connections
		Move on to Step 4	Fan not working	Replace the fan Op. 5040C30 FAN MOTOR - R+R
4	CHECK ON CORRECT OPERATION	All OK	Problems encountered	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Search for the problem in the climate control flexible transmission cables/kinematic mechanisms

Automatic Air Conditioning

The flow of air sent by the fan motor in the passenger compartment using the manual speed control is not sufficient; it does not correspond to the speed set.

1	CHECK ON OPERATION OF FAN BY CLIMATE CONTROL SYSTEM CONTROL UNIT	All OK	Problems encountered	Operation
		Results of the tests
	With the engine started, set the climate control system control unit in the AUTO position, adjust the temperature to 22 °C, position the recirculation to outside air intake and the distribution to the front position. Adjust the fan button (+ side) gradually increasing the speed set and then decreasing the speed using the (- side) button and check the effect on the variation of the air flow rate	End of diagnosis	There is no variation in the air flow rate	Move on to Step 2
2	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Connect the diagnostic equipment and check: that there are no errors at the passenger compartment fan that there are no errors at the distribution actuator that there are no errors linked to the fan (short circuit errors)	Move on to Step 3	Error at the passenger compartment fan.	Move on to Step 5
			Error at the distribution actuator	Move on to Step 6
			Short circuit error	Move on to Step 4
3	AIR DUCTS CHECK	All OK	Problems encountered	Operation
	Check that the air ducts are intact and the vents are not blocked and are correctly positioned in the opening	Move on to Step 4	Air ducts or vents obstructed.	Restore the operation of the air ducts and the vents removing any material causing an obstruction.
4	CHECK ON CORRECT OPERATION OF FAN	All OK	Problems encountered	Operation
	Check whether the electrical wiring connections are loose: disconnect/reconnect the connection to the engine mounting. Repeat the checks using the Examiner and check whether the fan error reoccurs. Carry out the tests described in Test 5040CE in order See Test 5040C AIR CONDITIONER BOX AND COMPONENTS	Move on to Step 5	Malfunction of the regulator built into the fan motor support	Replace the fan motor support
5	CHECK ON CORRECT OPERATION OF DISTRIBUTION ACTUATOR	All OK	Problems encountered	Operation
	Check whether the electrical wiring connections are loose. Disconnect/reconnect the connection at the engine support. If it persists, before replacing the actuator, check the operation by manually activating the function that the actuator should carry out. With the engine running, switch on the fan at maximum speed. Place the flaps in the various distribution positions using the control/control unit (in manual mode). Check the air flow intake into the passenger compartment with your hand over the vents.	End of diagnosis	There is no air flow intake into the passenger compartment through the vents.	Replace the distribution actuator Before refitting the replacement actutator, check whether the flaps inside the climate control unit may be broken or mechanically stuck

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Parts & tools for this job For 2003 Fiat Panda

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