Cold Start Valve Temperature Switches

Replacement Parts > Electrical, Lighting and Body > Switches

Cold Start Valve Temperature Switches

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What is a Cold Start Valve Temperature Switch?

A Cold Start Valve Temperature Switch is a type of switch that regulates the flow of coolant from the engine block to the heater core in a vehicle. It creates a cold start by allowing the coolant to flow to the heater core when the engine is cold and then restricting the flow when the engine is warm.

What is the purpose of a Cold Start Valve Temperature Switch?

The purpose of a Cold Start Valve Temperature Switch is to ensure that the engine starts properly when cold and that the heater core does not overheat when the engine is warm. It helps to regulate the temperature of the coolant in the vehicle.

How do I determine if my Cold Start Valve Temperature Switch is faulty?

To determine if your Cold Start Valve Temperature Switch is faulty, you should first check the wiring and connections to the switch. If the wiring and connections appear to be in order, then you can test the switch by starting the engine and then checking the temperature of the coolant. If the coolant is not at the correct temperature, then the switch may be faulty.

Can a faulty Cold Start Valve Temperature Switch cause damage?

Yes, a faulty Cold Start Valve Temperature Switch can cause damage to the engine and the heater core. If the switch is not working correctly, then the coolant may not be at the correct temperature and can cause the engine and heater core to overheat.

How do I replace a Cold Start Valve Temperature Switch?

To replace a Cold Start Valve Temperature Switch, you will need to:

  1. Disconnect the negative battery cable
  2. Unscrew the switch from the engine block
  3. Remove the switch from the vehicle
  4. Install the new switch
  5. Reconnect the negative battery cable


How often should I inspect my Cold Start Valve Temperature Switch?

It is recommended that you inspect your Cold Start Valve Temperature Switch at least once a year to ensure that it is in good working condition.