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The temperature blend actuator is located behind the dash assembly. Unfortunately the entire dsah assembly must be removed to gain access to it.
Assuming the "actuator" being asked about is the one for the temperature blend door...See "Related Questions" below for lots of detailed information / instructions on replacing
The temp blend door actuator would be found behind the dash assembly mounted to the HVAC box. Unfortunately the dash needs to be removed to gain access to the actuator.
The temperature blend door and actuator is located behind the dash assembly. The dash assembly needs to be removed to gain access to the blend door assembly.
Behind the dashboard
Could be, Stuck open thermostat, Low on coolant, Plugged heater core, Temperature blend door actuator malfunction.
my 2000 de ville hides the blend door activator behind the glove box to the left
replace temperature door actuator.
The heater blend door is not run by vacuum. It is run by an electric actuator.
The entire dash assembly needs to be removed to gain access to the blend door actuator. Big job, suggest acquiring a shop manual of you plan on doing this job yourself.
Blend door actuator.
AnswerEven more common is the temperature blend door actuator/motor that drives the blend door fails.A $45 and 20-30 minute repair.See "Related Questions" below for moreAnswerThis is a fairly common Ford problem. What happens here, is that the blend door actuator moves normally, but the blend door is cracked where the actuator drive fits into it. You're going to need to replace the entire HVAC case. Contact your Ford dealer parts dept. and have your VIN handy. Keep some lube handy before making that phone call.