Mercedes-Benz 420SEL Condenser Fan Relay Replacement Costs

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Condenser Fan Relay Replacement Service

How much does a Condenser Fan Relay Replacement cost?

On average, the cost for a Mercedes-Benz 420SEL Condenser Fan Relay Replacement is $145 with $50 for parts and $95 for labor. Prices may vary depending on your location.

Car	Service	Estimate	Shop/Dealer Price
1989 Mercedes-Benz 420SELV8-4.2L	Service typeCondenser Fan Relay Replacement	Estimate$214.83	Shop/Dealer Price$257.29 - $345.30
1988 Mercedes-Benz 420SELV8-4.2L	Service typeCondenser Fan Relay Replacement	Estimate$194.83	Shop/Dealer Price$237.32 - $325.35
1991 Mercedes-Benz 420SELV8-4.2L	Service typeCondenser Fan Relay Replacement	Estimate$194.83	Shop/Dealer Price$237.32 - $325.35
1990 Mercedes-Benz 420SELV8-4.2L	Service typeCondenser Fan Relay Replacement	Estimate$194.83	Shop/Dealer Price$237.28 - $325.28
1986 Mercedes-Benz 420SELV8-4.2L	Service typeCondenser Fan Relay Replacement	Estimate$194.83	Shop/Dealer Price$237.35 - $325.40
1987 Mercedes-Benz 420SELV8-4.2L	Service typeCondenser Fan Relay Replacement	Estimate$194.83	Shop/Dealer Price$237.32 - $325.35

Show example Mercedes-Benz 420SEL Condenser Fan Relay Replacement prices

What is the Condenser Fan Relay all about?

The condenser fan relay connects to the condenser fan and allows it to turn on when the air conditioner in the vehicle is turned on. It enables the cooling fan to pull air through the radiator and the condenser to cool out the vehicle. The relay is part of the cooling fan circuit. Other components include a temperature sensor, control module, and the fan motor.

The relay is the most likely component to fail in the circuit and must be replaced. The relay coil will generally read between 40 and 80 ohms on a test meter. If it reads higher, the relay may be working but is failing and should be replaced right away. If the reading is low, it means the relay has already failed. If you attempt to run the AC when the relay doesn’t work properly, you may cause it to overheat or even result in the engine overheating.

Keep in mind:

Some vehicles have two fans – one runs the radiator and the other operates the condenser.
Both fans should come on when the AC is activated.
When the relay is failing, it may work some of the time but not all of the time – don’t continue to use it without having it checked out first.
If you gently shake the relay and hear something rattling, it indicates that the armature has broken.

How it's done:

The condenser fan relay is verified that it needs to be replaced. The relay is located within the main fuse box.
The defective condenser fan relay is removed from the fuse box and connector checked to be functional.
The new condenser fan relay is installed into the connection and the fuse box is closed.
The A/C is turned on and the condenser fan relay is tested for operation.
The vehicle is tested to ensure proper operation of the condenser fan relay and fans.

Our recommendation:

If the air doesn’t circulate when the air conditioning is turned on, it may indicate a failed condenser fan relay. Turn off the air conditioning system until it can be inspected by one of our expert mechanics. Attempting to use the air conditioning with a bad fan relay can cause the engine to overheat and lead to other problems.

What common symptoms indicate you may need to replace the Condenser Fan Relay?

Air conditioner fails to work properly
Air conditioner may work one time and not the next
Engine is overheating

How important is this service?

It is extremely important to have the condenser fan relay replaced if you plan on using the air conditioner. Serious damage to the engine can result if you attempt to run the AC with a faulty or failed condenser fan relay. If it occurs at the end of hot weather season and you do not plan on operating the AC, you may wait to replace it at your earliest convenience.

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Carlos

28 years of experience

525 reviews

Carlos

28 years of experience

by Laszlo

Mercedes-Benz 420SEL V8-4.2L - Serpentine/Drive Belt - Ontario, California

Carlos came on time (unlike others who cancelled the appointment several times). He came, TWICE because of my car needed more parts than expected. Great job, friendly, very professional, I HIGHLY recommend him, and will make sure next time - if needed - he will be the one I ask for. Thank you Carlos

Tien

23 years of experience

903 reviews

Tien

23 years of experience

by Mary

Mercedes-Benz 420SEL V8-4.2L - Power Window Switch Replacement (Passenger Side Front, Passenger Side Rear) - Oakland, California

Tiens was very nice to work with. He fixed 2 things and ordered parts for other items.

Dave

23 years of experience

303 reviews

Dave

23 years of experience

by Sandra

Mercedes-Benz 420SEL V8-4.2L - Oil Change - San Jose, California

Carlos

28 years of experience

525 reviews

Carlos

28 years of experience

by Alfredo

Mercedes-Benz 420SEL V8-4.2L - Alternator Repair - Riverside, California

Carlos is chill dude; showed up early and helped me out in under an hour. He also gave me tips on how to become a mechanic. Honestly will book him again if anything happens.

Excellent Rating

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