CAR Radiator fan switch

Fan switch sensor: common defects and their signs

  1. Terminals oxidation.
    • The fan doesn’t switch on when the cooling liquid reaches the critical temperature.
    • The engine overheats.
    • The fan turns on earlier than cooling liquid temperature reaches a critical point.
  2. Body deformation.
    • The fan is running constantly, regardless of cooling liquid temperature.
    • Antifreeze boiling occurs.
    • The fan turns on but runs erratically.

How to replace fan switch sensor?

Specialists recommend to check the car fan switch sensor every 25,000 kilometers of mileage. The part can not be repaired, and should be immediately replaced at appearance of defect signs. Buying a component for a car, make sure that the response temperature of new fan switch sensor is equal to the same parameter of the broken down component.

The procedure for part replacement depends on its mounting location. If the sensor is mounted in the cooling liquid connecting pipe, it can be replaced on your own. Before starting works, study technical documentation, as the replacement algorithm may vary for different car models. Basically, the replacement algorithm is as follows:

  1. After the engine cools down, disconnect the wire from the negative terminal of the battery.
  2. Disconnect terminals from the fan switch sensor and remove it.
  3. Treat a new component thread with a thin layer of sealing compound, or cover it with teflon ribbon, in order to prevent cooling liquid leakage.
  4. Install a new gasket under a new sensor and screw the latter, avoiding excessive tightening.
  5. Reassemble in the reversed order.

If the fan switch sensor is mounted in the radiator or on the cylinder head, near the thermostat, the replacement process will be more laborious. It is recommended to entrust this procedure to service station specialists.

Radiator fan switch Information

Radiator fan switch: Bestsellers

-17%
VEMO Relay, radiator fan castor
Article № : V15-71-0002
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£ 8,13
£ 6,75
incl. 20% VAT, Shipping
  • Voltage [V]: 12
  • Relay function: Clamp 87, Terminal 30
  • Rated Current [A]: 40
  • Condition: New

OEM-Number

A0 02 5 421 319

14 19 5 125 3B

4H 09 5 125 3A

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FEBI BILSTEIN Relay, radiator fan castor
Article № : 26141
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£ 49,87
£ 41,39
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  • Number of connectors: 18
  • Weight [kg]: 0,25
  • Condition: New

OEM-Number

1J 09 1 950 6K

1J 09 1 950 6Q

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-17%
CALORSTAT by Vernet Temperature Switch, radiator fan
Article № : TS1899
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£ 6,15
£ 5,10
incl. 20% VAT, Shipping
  • Shut-off Point [°C]: 87
  • Thread Size: M22x1.5
  • Technical Information Number: Circuit N.O.
  • Condition: New

OEM-Number

59 92 7 46

60 58 5 603

In stock
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-17%
FAE Temperature Switch, radiator fan
Article № : 36050
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£ 13,13
£ 10,90
incl. 20% VAT, Shipping
  • Opening Temperature [°C]: 87
  • Closing temperature [°C]: 82
  • Condition: New

OEM-Number

32 86 6 410

In stock
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-17%
VEMO Control Unit, electric fan (engine cooling)
Article № : V25-79-0009
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£ 50,87
£ 42,22
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  • Supplementary Info: Original VEMO Quality
  • Number of Poles: 2
  • Connector Shape: Oval
  • Condition: New

OEM-Number

94 00 0 290 4

15 93 9 00

6W 1Z 8 B65 8AC

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ERA Temperature Switch, radiator fan
Article № : 330181
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£ 7,24
£ 6,01
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  • Number of connectors: 2
  • Condition: New

OEM-Number

77 00 7 825 03

77 00 7 960 48

44 02 3 09

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FEBI BILSTEIN Temperature Switch, radiator fan
Article № : 01102
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£ 9,56
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  • Outer thread [mm]: M14 x 1,5
  • Number of connectors: 2
  • Switch Point [°C]: 90, 95
  • Condition: New

OEM-Number

61 31 1 364 272

13 78 5 04

12 76 2 29

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-17%
JP GROUP Temperature Switch, radiator fan
Article № : 1194000500
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Buy JP GROUP 1194000500
£ 7,82
£ 6,49
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  • Equipment Variant: Switch point 95/84?, Switch point 102/91?
  • Condition: New

OEM-Number

19 19 5 948 1C

19 19 5 948 1A

32 19 5 948 1C

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