Signs of a Malfunctioning Heater Control Valve

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Signs of a Malfunctioning Heater Control Valve
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The heater control valve is a cooling and HVAC
system component that is commonly found in most
of the cars.
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The heater control valve is normally mounted near
the firewall and acts as a valve that controls
the flow of the coolant from the engine to the
heater core.
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When the valve is opened, the warm engine coolant
passes through the valve and into the heater
core, so that hot air can be produced from the
car's vents.
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Whenever the heater control valve fails it can
cause issues with the car's cooling system and
also with the operation of the heater.
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Here are the signs exhibited by a malfunctioning
heater control valve.
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Heater doesn't work
Heater doesn't work
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One of the first symptoms of a malfunctioning
heater control valve that you will come across is
the inability of the heater to produce warm air.
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When the heater control valve breaks or
malfunctions, the flow of the coolant to the
heater core gets restricted or stops completely.
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Consequently, without the constant flow of
coolant to the heater core, the heater will not
be able to produce warm air for the cabin.
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Heater doesn't work
Leaking coolant
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This is one of the most common issues associated
with the malfunctioning of the heater control
valve that is a coolant leak.
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In due course of time the heater control valve
can wear out and crack which will cause the
coolant to leak from the valve.
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Moreover, the heater control valve can also leak
from excessive corrosion which is caused due to
contact with old or contaminated engine coolant.
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Heater doesn't work
Erratic heater behavior
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If you come across erratic behavior from the
engine, then this is also a sign of an issue with
the car's heater control valve.
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A malfunctioning heater control valve will not
be able to properly control the coolant flow to
the heater which leads to problems in operating
the heater.
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Moreover, the heater may produce hot air but only
at certain times like in the idle condition when
hot air may come and go.
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Heater doesn't work
Conclusion
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Whenever you come across the above-mentioned
signs, then you can be sure that the heater
control valve has malfunctioned.
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You must immediately take your car to an
automotive repair shop to fix the issue as
further delay can also affect the other
components of your car.
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