22 · Diagnostics

Fan does not work at different speeds

Make: Fiat
Model: 500 Factory Service Manual
Year: 2007–2024
Section: Climate control › Fan does not work at different speeds

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Fault diagnosisFan does not work at different speeds

FAN DOES NOT WORK AT DIFFERENT SPEEDS

1.2 8v, 1.3 Multijet, 1.4 16v · Automatic climate control

The fan does not work when the speed control button is used.

1	CHECK ON OPERATION OF CLIMATE CONTROL SYSTEM CONTROL UNIT FAN	All OK	Problems encountered	Operation
		Test results
	With the engine started, set the climate control system control unit to the AUTO position, adjust the temperature to 22 °C, place the recirculation at the outside air intake and the distribution to the front position. Adjust the fan button (upper arrow) gradually increasing the speed set and then decrease the speed using the button (lower arrow), thereby checking the effect of the air flow rate variation.	End of diagnosis	The fan does not work	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 linked to the fan (short circuit errors).	Move on to Step 4	1. Error at the passenger compartment fan. 2. Short circuit error. 3. Fan operating module error.	1. Move on to Step 4 2. Move on to Step 3 3. Move on to Step 4
3	CLIMATE CONTROL NODE ELECTRICAL CONNECTIONS CHECK	All OK	Problems encountered	Operation
	With the engine switched off, remove the control unit from the dashboard support and disconnect the connector, visually inspecting for any damage at the connector contacts. Then reconnect it correctly to check for any false contacts.	Move on to Step 4	Electrical connections loose or damaged.	Restore the loose or damaged electrical connections. See E6020 AIR CONDITIONING
4	CHECK ON ELECTRICAL CONNECTIONS AND FAN OPERATION	All OK	Problems encountered	Operation
	Check whether the electrical wiring connections are loose. Disconnect/reconnect the connection to the engine mounting. Disconnect the connector and connect to a feeder. In these conditions the motor should rotate at the maximum speed, indicating that the operating module is not working	End of diagnosis	1. Electrical connections loose. 2. The fan does not work. 3. The operating module does not work.	1. Renew the correct connections See E6020 AIR CONDITIONING 2. Replace the fan Op. 5040C30 AIR CONDITIONING FAN - R.R. 3. Replace the fan motor electronic variator Op. 5040C44

1.2 8v, 1.3 Multijet, 1.4 16v · Manual air conditioning

The fan does not work when the speed control selector is used.

1	SPEED SELECTOR CORRECT OPERATION CHECK	All OK	Problems encountered	Operation
		Test results
	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 2	Speed selector fails to work.	Replacement of ceramic resistor Op. 5040C48 A/C FAN MOTOR RESISTOR - R+R
2	FAN CORRECT OPERATION CHECK	All OK	Problems encountered	Operation
	Check for loose connections in the electrical wiring. 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.	End of diagnosis	1. Electrical connections loose 2. Fan not working.	1. Refit the electrical connections correctly. 2. Replace the fan Op. 5040C30 AIR CONDITIONING FAN - R.R.

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Parts & tools for this job For 2007 Fiat 500

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