What is a heater control valve replacement?
The heater control valve allows your car's heating and cooling systems to stay in sync. During the replacement, your mechanic will check the heater control valve for leaks, contamination, or corrosion; replace it, and then inspect the other heater hoses.
When should I replace my heater control valve?
If the heater control valve is damaged, you'll have trouble heating the cabin. Here's what to look for:
Coolant leaks: A failing valve might send coolant dripping through the dash and onto the car floor. Your car will probably post a coolant-level warning light on the dash.
An overheating engine: If coolant continues to leak, your car will lose the ability to cool the engine, causing it to overheat.
Cold air blowing from the car heater: If the control valve is stuck in the “OFF” position, hot coolant can’t flow to the heater core to produce warm air, causing cold air to blow from the vents.
Your heater won’t adjust: Without being able to regulate the flow of coolant to the heater core, you won’t be able to adjust how much heat the cabin receives.
Key Takeaway Heating issues and coolant leaks can signal a faulty heater control valve.
What’s the life expectancy of a control valve?
Although heater control valves are designed to last for the entire lifespan of a vehicle, this doesn't always work out. The heating components of your car can be shortened by external factors, such as temperature extremes, unexpected damage, and contamination, as well as internal factors, such as wear and age. If you're concerned about how long the replacement valve may last, look for one with a long warranty.
Can I replace a heater control valve myself?
The heater control valve replacement is not a DIY project for beginners. In addition to basic equipment, you'll need to be comfortable working with heating systems and dismantling a dashboard. Wear protective equipment; antifreeze and coolant can be extremely harmful if inhaled and irritating to the skin and lungs.