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On average, the cost for a Mercedes-Benz S420 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 |
|---|---|---|---|
| 1999 Mercedes-Benz S420V8-4.2L | Service typeCondenser Fan Relay Replacement | Estimate$214.83 | Shop/Dealer Price$257.29 - $345.30 |
| 1995 Mercedes-Benz S420V8-4.2L | Service typeCondenser Fan Relay Replacement | Estimate$194.83 | Shop/Dealer Price$237.32 - $325.35 |
| 1996 Mercedes-Benz S420V8-4.2L | Service typeCondenser Fan Relay Replacement | Estimate$194.83 | Shop/Dealer Price$237.32 - $325.35 |
| 1998 Mercedes-Benz S420V8-4.2L | Service typeCondenser Fan Relay Replacement | Estimate$194.83 | Shop/Dealer Price$237.28 - $325.28 |
| 1994 Mercedes-Benz S420V8-4.2L | Service typeCondenser Fan Relay Replacement | Estimate$194.83 | Shop/Dealer Price$237.35 - $325.40 |
| 1997 Mercedes-Benz S420V8-4.2L | Service typeCondenser Fan Relay Replacement | Estimate$194.83 | Shop/Dealer Price$237.32 - $325.35 |
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.
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.
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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