Mercury Topaz Coolant Temperature Switch (Sensor) Replacement at your home or office.

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Coolant Temperature Switch (Sensor) Replacement Service

How much does a Coolant Temperature Switch (Sensor) Replacement cost?

On average, the cost for a Mercury Topaz Coolant Temperature Switch (Sensor) Replacement is $107 with $12 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1985 Mercury TopazL4-2.3LService typeCoolant Temperature Switch (Sensor) ReplacementEstimate$154.85Shop/Dealer Price$174.82 - $212.21
1993 Mercury TopazL4-2.3LService typeCoolant Temperature Switch (Sensor) ReplacementEstimate$134.85Shop/Dealer Price$154.83 - $192.24
1984 Mercury TopazL4-2.3LService typeCoolant Temperature Switch (Sensor) ReplacementEstimate$134.85Shop/Dealer Price$154.83 - $192.24
1984 Mercury TopazL4-2.0L DieselService typeCoolant Temperature Switch (Sensor) ReplacementEstimate$134.85Shop/Dealer Price$154.81 - $192.20
1985 Mercury TopazL4-2.0L DieselService typeCoolant Temperature Switch (Sensor) ReplacementEstimate$118.89Shop/Dealer Price$134.90 - $160.35
1987 Mercury TopazL4-2.3LService typeCoolant Temperature Switch (Sensor) ReplacementEstimate$134.85Shop/Dealer Price$154.83 - $192.24
1992 Mercury TopazV6-3.0LService typeCoolant Temperature Switch (Sensor) ReplacementEstimate$139.85Shop/Dealer Price$159.70 - $197.00
1989 Mercury TopazL4-2.3LService typeCoolant Temperature Switch (Sensor) ReplacementEstimate$139.85Shop/Dealer Price$160.07 - $197.66
Show example Mercury Topaz Coolant Temperature Switch (Sensor) Replacement prices

What is the Coolant Temperature Switch (Sensor) all about?

The coolant temperature switch, also called the coolant temperature sensor, is a switch that reads the engine coolant temperature and sends a signal to the engine control module, or ECM, to control other functions of engine operation such as the air-fuel ratio.

It is also called a switch because on some cars, it is used to turn on the engine cooling fan at a specific temperature. This aids in the engine warm-up process as well as keeping the engine at a safe operating temperature.

Keep in mind:

  • The coolant temperature switch is a crucial part of the cooling system. If faulty, it can cause severe internal engine damage due to overheating, incorrect air-fuel ratio, or incorrect ignition timing. It can also cause shorter life to the cooling fan motor or other electrical components of the cooling system.
  • Some vehicles are equipped with a separate sensor to display the engine temperature to the driver via the temperature gauge.

How it's done:

  • The Coolant Temperature Switch is verified that it needs to be replaced. The coolant is drained until the switch is exposed.

  • The defective Coolant Temperature Switch is removed by disconnecting the connector and removing it from the manifold.

  • The new Coolant Temperature Switch is installed into the mounting hole in the manifold and the electrical connector is reconnected. The coolant is then refilled.

  • The Coolant Temperature Switch is tested for operation, codes cleared, and retested to ensure all codes have been resolved.

  • The vehicle is road tested to ensure proper operation of the Cooling System.

Our recommendation:

If you suspect that your coolant temperature switch has failed, have one of our licensed mechanics come out immediately to diagnose the problem.

What common symptoms indicate you may need to replace the Coolant Temperature Switch (Sensor)?

  • Check Engine light on
  • Engine overheating
  • Cooling fan runs intermittently
  • Engine misfires, stalls, or idles roughly
  • Erratic coolant temperature

How important is this service?

This part, when faulty, could cause the fan to run intermittently or not at all, which in turns causes overheating or overuse of the cooling fan motor. Whenever overheating occurs, severe engine damage is a possibility.

The engine air-fuel ratio is what keeps it running smoothly. If the ratio gets skewed, the engine will have poor fuel economy and run poorly or not at all. The coolant temperature switch is important because it gives the ECM the information it needs to make this calculation and run the engine optimally. YourMechanic will be able to tell you if this part is performing correctly.

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Meet some of our expert Mercury mechanics

Real customer reviews from Mercury owners like you.

Excellent Rating

(3)

Rating Summary
3
0
0
0
0
3
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Jose

10 years of experience
285 reviews
Jose
10 years of experience
Mercury Topaz L4-2.3L - Car is not starting - Zephyrhills, Florida
Very professional, on time and polite.

Andrian

32 years of experience
185 reviews
Andrian
32 years of experience
Mercury Topaz L4-2.3L - Battery Cable Replacement (Negative) - Pompano Beach, Florida
A nicer person you could NOT find. Friendly, knowledgeable and timely. Goes the extra mile to make sure the job is done correctly and point out other issues to consider. Would NOT hesitate to book with him for future repairs or recommend to others. If you require auto service - BOOK HIM!!!

Attila

19 years of experience
928 reviews
Attila
19 years of experience
Mercury Grand Marquis V8-4.6L - Coolant Temperature Switch (Sensor) - Avenel, New Jersey
exceeded expectations

Walter

46 years of experience
348 reviews
Walter
46 years of experience
Mercury Milan L4-2.3L - Coolant Temperature Switch (Sensor) - Tulsa, Oklahoma
Walter is a top notch mechanic. He does a great job. I would highly recommend him to anyone, any job, any vehicle. He's a 10 out of 10. He made sure all tasks were completed. Awesome mechanic. However, as far as the customer personal every agent wasn't good. Rosa and Julia are the only customer service personal I would ever speak with on the phone to complete another job. Both had empathy, great listening skills, effective communication, and compassion for their jobs. It could be heard. As for Jesus, Ceasar, Don, Kenya, Bianca needs more training with job coaches and should listen to my calls. They didn't listen to me and should have completed the tasks at the first call. Customer service personal are the first line of contact with the customer so everyone needs to be on the same page from the beginning, same verbage, same understanding, same information for the company. I can see Moblie Mechanics as a trend for the times , due to pandemics. People will need them to come to the house and work places to complete car mechanical needs. Thank you so much for your time. Have a great year and stay well. Sincerely yours Mary Hambright-Bender.

Excellent Rating

(3)

Rating Summary
3
0
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0
3
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Number of Mercury Coolant Temperature Switch (Sensor) Replacement services completed
33+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercury MECHANICS
600+
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