What it does
Regulates coolant flow by temperature. Slow warm-up and overheating require different evidence.
Test the surrounding system before replacing this component.
- 01ObserveRegulates coolant flow by temperature. Slow warm-up and overheating require different evidence.
- 02Check inputsPower, ground, command, mounting, and conditions
- 03CompareCompare cold sensor data with ambient conditions / Observe the complete warm-up pattern
- 04Budget30 currencies · USD, CAD, EUR, and GBP preview · full values below · planning onlyComponent$616–$716 USD · per replacement estimate · U.S. national parts-and-labor estimate · Price evidence reviewed 2026-09-23
- CAD CA$875–CA$1,025
- EUR €545–€640
- GBP £465–£545
- 05DecideReject or support the component cause
- 06VerifyApply the exact repair and recreate the symptom
Where it is located
Location and access vary by platform, engine, drivetrain, market, and installed equipment. Identify the exact component using the vehicle’s service information before disconnecting or removing anything.
Symptoms are clues—not proof
Start with the system symptom and operating conditions. A failed connection, control input, related component, incorrect prior repair, or mechanical condition can imitate component failure.
Use the exact safety procedure
Confirm isolation, support, pressure, temperature, and stored-energy hazards for the vehicle before testing.
Testing focus
Compare cold sensor data with ambient conditions
Record the result and compare it only with authoritative information for the exact vehicle and test conditions.
Observe the complete warm-up pattern
Record the result and compare it only with authoritative information for the exact vehicle and test conditions.
Separate slow warm-up from true overheating
Record the result and compare it only with authoritative information for the exact vehicle and test conditions.
Verify exact installation orientation and cooling-system service procedure
Record the result and compare it only with authoritative information for the exact vehicle and test conditions.
Replacement boundary
IAR does not publish a universal replacement procedure for this component.
Planning estimate only; test before replacing. Not a diagnosis or quote.
Show 26 more currencies
- Source 1: Thermostat Replacement Cost EstimateSource date 2026-09-03 · Retrieved 2026-09-23