Heater Valve
The heater valve controls how much hot coolant flows into the heater core, which sets the temperature of the air in your cabin. When it sticks or fails, you might get heat that won't turn off, no heat at all, or trouble adjusting the temperature. Replacing the valve restores proper control over your cabin heat.
Find a TechnicianCommon causes
- Heater valve stuck open, causing heat that won't shut off
- Heater valve stuck closed, resulting in little or no heat
- Coolant leak from a worn or cracked valve
- Inconsistent cabin temperature that's hard to adjust
- Corrosion or buildup jamming the valve mechanism
Frequently asked questions
What happens when the heater valve fails?
Depending on how it fails, you may get constant heat that won't turn off or no heat at all. A stuck or leaking valve can also cause coolant loss, so it's worth addressing quickly.
Can a bad heater valve cause my car to overheat?
It can if it leaks enough coolant or disrupts proper flow through the system. Having it inspected helps prevent overheating and protects your engine.
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