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The heater blend door is not run by vacuum. It is run by an electric actuator.

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14y ago

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What are some reasons for a 1999 Chevy Blazer LT 4x4 heater problems?

Low on coolant (leak in coolant system) Thermostat stuck open Heater core plugged Temperature blend door actuator failure Vacuum supply to HVAC dissconnected


Where is the heater control valve on a 1999 Chevy s10 blazer?

The heater temp blend valve is located behind the dash assembly. The dash assembly must be removed to gain access.


Where is the heater control cable on a 2003 Chevy blazer?

It does not use a cable. The heater blend door is operated by a electric motor. The complete dash assembly needs to be removed to gain access to the unit.


Where is the heater control valve located on a 2000 Chevy blazer?

The heater control valve (temp blend door) is located behind the dash assembly. The dash assembly has to come out to gain access to it.


How do you change the blender for Chevy Blazer 1998?

Changing the heater temp blend door actuator requires removal of the dash assembly. Big Job. You will need a shop manual to attempt that one.


Can low coolant cause no heat in 97 Chevy Blazer?

Yes it could and so could a stuck open thermostat or a plugged heater core or a faulty temperature blend door actuator.


How do you replace an electric blend door in a Chevy blazer?

Remove the dash assembly to gain access to the blend door actuator.


How do you fix heater air control on a 2002 Chevy blazer?

The heater temp blend door actuator is located behind the dash assembly, attached to the top of the HVAC box. Unfortunately, the entire dash assembly must be removed to gain access.


Why is the heat always going out on your Chevy Blazer?

The temp blend door actuator is probably at fault.


Where does the the blend door get its vacum located on a 2001 Chevy s10?

In a 2001 Chevy S10, the blend door vacuum is typically sourced from the engine's intake manifold. A vacuum hose connects the manifold to the HVAC system, allowing the blend door actuator to receive the necessary vacuum to function. If there are any issues with the blend door operation, it’s important to check this vacuum line for leaks or blockages.


Why does your Chevy blazer blow hot air out of vents?

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Where is the blend door on 1998 chev blazer heater?

The temp blend door is located in the HVAC box behind the dash assembly. The dash assembly must be removed to gain access.