Thermal Vacuum Switch Replacement at your home or office.

Our certified mechanics come to you · Backed by our 12-month, 12,000-mile warranty · Get a fair and transparent estimate upfront

Thermal Vacuum Switch Replacement Service

What is the Thermal Vacuum Switch all about?

Several vacuum-operated engine functions are only implemented when the engine is warm. For example, smog control systems like the EGR valve require the engine to be hot before they can effectively operate. A thermal vacuum switch only allows vacuum to pass through the switch when the correct temperature has been reached. A valve inside opens, and the vacuum, or negative pressure, is able to move through. If the thermal vacuum switch is plugged or stuck, the vacuum passage will not switch and the system it controls will not operate. If the vacuum switch is leaking, there may not be enough vacuum to control all the vacuum-operated systems in the car.

Keep in mind:

  • The thermal vacuum switch is used to control several systems in your vehicle, including the HVAC.
  • A vacuum leak can cause issues with unrelated systems as well.

Our recommendation:

Thermal vacuum switches do not require maintenance and rarely fail. If you believe there is a vacuum problem in your vehicle, have one of our expert mechanics diagnose it.

What common symptoms indicate you may need to replace the Thermal Vacuum Switch?

  • Vacuum-operated system such as the power brakes or HVAC controls operates incorrectly or intermittently
  • Hissing noise under the hood, as if air is escaping

How important is this service?

A thermal vacuum switch failure can cause a loss of vacuum to several components, not just the affected system that particular switch controls. Safety systems such as power brakes can be affected, so a failed thermal vacuum switch should be addressed immediately.

Fast and easy Thermal Vacuum Switch Replacement service at your home or office.

Recent articles & questions

P0826 OBD-II Trouble Code: Up and Down Switch Input Circuit
P0826 means there is an issue with a circuit for the up and down switch, usually due to a disabled manual shifter or TCM placed in Limo-in mode.
How to Replace Axle Seals
Axle seals fail when there is a visible leak or a major puddle of gear oil underneath the vehicle. In some cases, the axle may pop out entirely.
P3468 OBD-11 Trouble Code: Cylinder 9 Deactivation/Intake Valve Control Circuit High
What What the P3468 code means This code indicates that there is a problem with the intake valve on cylinder number 9. When your vehicle’s powertrain control module (PCM) notices that the measured values of the mass airflow sensor, the...

If one tie rod is bad on my 2005 Toyota Camry do I need to replace both of them.

Hello. Though it is good to have balance in your steering system and it is good practice to replace parts on both sides at the same time, you do not need to do that. You onlt need to replace the...

Hi Mr. Nicholas: Engine light of my Accord Lx 2010 comes on. I want to be sure the problem is with the catalytic converter or O2 s

Hi there. In short, yes - it is highly probable that the check engine light is not 100% caused by the catalytic converter. Most OBD-II trouble codes related to this system are actually caused by O2 sensor failure, electrical harness...

Exhaust was cut off and I need to repair it. What do I need?

As long as the vehicle has a catalytic converter and muffler, you can put what ever pipe you want on the vehicle as long as the pipe is not near any fuel tanks, electrical wiring, and any brake lines. It...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 ·