Rick's Free Auto Repair Advice

Posts Tagged: blend door

heat not working ford explorer

ford explorer heat not working Ford vehicles have a problem with the blend door. If the heater in your ford explorer not working. You cannot reduce or raise the temperature because the blend door is binding in the stuck open position. When the blend door binds, your heat ford explorer not working. Ford’s answer is the replace the entire heater box. That’ll mean removing the dash, discharging the A/C and replacing the entire module. Figure about $1,500 for that. Or, you can buy a blend door replacement kit from Dorman. … Read More

AC blows warm air except in MAX mode – Ford

AC blows warm air except in MAX mode, Explorer, Mercury Mountaineer This one will really make you nuts. You set the A/C on cold and you don’t get any cold air. You’re thinking you’ve got an A/C problem. Low of refrigerant? Bad compressor? But then you switch it to MAX A/C and all of the sudden it blows cold. What gives? Well, if you’re driving a 1995-98 Ford Explorer or Mercury Mountaineer, the fix may be as simple as a bum blend door in the heater box. This only happens … Read More

AC light blinking Chrysler Minivans

Why does the AC light blink on Chrysler Minivans If the battery is disconnected on Chrysler minivans, the blend and mode door actuator motors “forget” their position and must be recalibrated. Thankfully, you don’t need a scan tool to do this. Just follow these steps: 1. Start the engine and set the blower motor to high. 2. Set the mode position to PANEL. 3. Open all the A/C outlets and set temperature to COLD. Move both sliders if van is equipped with passenger controls. 4. Push and hold the REAR … Read More

Recalibrate chrysler ac control head

How Recalibrate a Chrysler heater control The blend and mode doors on late model Chrysler vehicles are driven by DC servo motors. If the motors get out of synchronization, the control head doesn’t know where they are. That can result in cold air when you command heat and vice versa. It can also screw up where the air blows. Here’s how to perform a calibration routine on Caravan, Voyager, and Town and Country. It works on many other Chrysler products as well. 1. Turn Ignition switch to ON 2) Press … Read More

Blower motor slows down when accelerating

Blower motor slows down when accelerating If your blower motor slows down when accelerating, it may have nothing to do with the motor itself. Many vehicle manufacturers use vacuum motors to operate heating/AC doors. Most vehicles have at least two of these vacuum motors. One motor is used to move a door that switches airflow “modes,” like defrost, heat, vent, etc. The other motor controls a door that regulates air temperature by “blending” outside or re-circulated air with freshly heated or cooled air. Other vehicles have a third vacuum motor … Read More


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