Is it dangerous to drive with a fan control module fault?

If the fan runs constantly, not dangerous, just noisy and inefficient. If the fan doesn’t run when needed, overheating is a real risk — this needs prompt repair.

What causes this module to fail?

Most commonly it overheats due to a failing internal heatsink connection or from having to work overtime powering a failing fan motor.

What is the module made of?

A power transistor circuit board mounted to a metal heatsink.

What is this part and what does it do?

Full description available in the product description section above. Contact us with clarifying questions.

How do I tell if my part is faulty?

See the 'Signs of a faulty part' section above or run a diagnostic at an auto service.

Yes - all our used parts are tested before sale and sold with guaranteed quality.

When should the part be replaced?

When warning signals appear, diagnostic codes are present, or the system malfunctions.

Fan control unit CITROEN C-CROSSER 2009

Name: Fan control unit CITROEN C-CROSSER 2009
Brand: CITROEN
SKU: 7820A055
Price: 36.00 EUR
Availability: InStock

OEM: 7820A055

Disassembled car photo

Engine running

Tested before shipping
Guaranteed quality
Fast delivery 3–7 days
14-day returns

What is this part and why does it matter?

The fan control module regulates the speed of the cooling fan(s) based on engine temperature, A/C demand, and vehicle speed, controlling when and how fast they run.

Ask a question

Not sure about compatibility? Send us your car's VIN and we'll confirm.

Ask about this product

Signs of a faulty part

If you notice any of the following, the part likely needs replacement:

Fan running constantly at full speed regardless of temperature
Fan not running at all, leading to overheating
Check Engine light with a fan control fault code

Installation information

Mounted near the fan shroud with a heatsink for cooling — connects to the fan motor and vehicle wiring harness.

Donor vehicle description

VIN: VF7VV4HNH8U971676
Make, model: CITROEN C-CROSSER
Year: 2009
Engine: Dizelis 2.2 HDi 115KW DW12MTED4 FAP
Transmission: 6-pārnesumu Mehāniska
Drive: 4WD
: Stūre kreisajā pusē
Colour: KTR - PILBARA GRAY ENAMEL

330 parts from this car

Frequently asked questions

A failed control module often defaults to running the fan continuously at full power as a safe failure mode, protecting the engine from overheating at the cost of extra noise and fuel consumption.

What our customers say

All reviews →

Price: affordable. Service: electrical equipment repair.
A
Andris B.
September 2026
Price: excellent.
D
Didier V.
August 2026
Super good! They came through with the part I needed, quickly and at a fair price! Thanks, and I definitely recommend!
I
Ilmars K.
August 2026
I ordered a Heater Blower Motor Resistor for a Toyota Avensis. Delivery took eight days from Latvia to Ireland. I installed it, and everything works perfectly. I wish this company success.
A
Aleksandr L.
Toyota Avensis
August 2026
No complaints about Evro Trans itself, everything's fine. But the delivery..... It felt like the order was being carried by turtles. 4 days from Riga to Daugavpils. Judging by the tracking, the parcel just sat somewhere behind a shed for 3 days, then they found it and delivered it the next day. I think that's why I won't be ordering there again.
P
Paul F.
June 2026
Super fast delivery of the part, and good quality of the used part. Thanks for the service.
N
Natālija I.
May 2026
I ordered antifreeze heaters and an auxiliary pump. Everything arrived quickly, the very next day, and matched the description. I'm satisfied.
J
Juris J.
February 2026
Excellent service, timely delivery, and complete transparency at every step. I highly recommend EvroTrans to anyone looking for a reliable partner!
E
Egor S.
November 2025
Bought a front fender for my car. I liked it! After payment they sent more than 20 photos of the problem areas, and it was packed very securely - took a while to unwrap.
I
Igors K.
Front fender
October 2025