Q: How do you replace a thermostat on a 2006 mercury mariner

asked by on

I pulled a code from the computor . and it was a P0128 . It told me that the Thermostat was stuck open and i cant even see the thermostat housing to get to it. i just need some tips on how best to remove it

My car has an automatic transmission.

Hello. Thank you for writing in. The basic procedure for replacing the thermostat is pretty simple. You start by accessing the thermostat. Remove the hoses and retaining screws, and then removing the housing. Replace the thermostat outside and inspect the housing for any damages. Make sure the housing and the hoses are clean and in good condition. Remove and clean off any old gaskets. Reconnect the hosing and the housing. Refill the coolant to proper level, and test the repair. Make sure the thermostat is installing correctly, as it is not impossible to install them upside down. The unit is located at the top of the engine and is relatively easy to locate and manipulate. For assistance replacing the thermostat, contact our service department to schedule an appointment.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. How do you replace a thermostat on a 2006 mercury mariner

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: My engine light and wrench illuminated, rough idling, when stopped and gas pedal depressed it snatches in gear.

Hello. If the Check Engine Light has come on I would always start with a code check. I would use my scan tool to see what codes are in the system as that would give me a good indication of...

Q: A/C won't turn off. 2006 Ford F150

Hello - there are 2 possibilities here: (1) an electrical switch - HVAC control in the dash or the low pressure switch in the refrigerant line) is keeping voltage on the compressor clutch, keeping it engaged, or (2) the compressor...

Q: My 2001 Mercury cougar will start just fine but will sputter/ shake then die when not pushing on the gas or stop/idle.

This may be a result of a dirty or failing idle air control valve. The idle air control valve reads the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.