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Why is the defrost not blowing on the windshield?

Why is the defrost not blowing on the windshield?

Can’t change airflow to floor either. Front Mode Control of air distribution system is not operating. This means that I have no control anymore in directing the air properly to defrost the windshield or to focus the heat toward the floor and away from the faces of people sitting in the front seats.

What to do when air pressure comes out of front vents?

I “rebooted” computer by disconnecting the battery for 5 minutes by pulling off the the cables. When I reconnected the battery the van computer reset and the blower worked in all modes again. All the air pressure is coming out the front vents when the defrost is on.

Why does my air conditioner blow hot air instead of hot air?

When A/C is turned on, occassionally blows hot air instead. Restart of the engine will usually solve the problem. Bought used and wasn’t told of the problem…..didn’t need defrost until two days ago (2 months after purchasing)and it’s stuck on floor and panel vents.

Why does my dual zone heater go cold?

Dual zone climate control module only get heat at the highest setting. when you set it to a lower setting by 1 degree it goes cold. I changed the module and one actuator. The other one on top is moving for the different direction of air flow. (is there only two?)

How does the air vent work on a defroster?

The vent control system for the defroster in integrated into the operation of all temperature controls and uses forced air provided by the blower motor. On newer cars the vent direction and temperature controls are operated by a series of 3 or 4 electrical actuator motors which are adjusted by the climate control module.

Where is the defroster located in an air conditioner?

The defroster is part of the heater and air conditioner system which is housed inside of the heater plenum. The vent control system for the defroster in integrated into the operation of all temperature controls and uses forced air provided by the blower motor.

How does the climate system control the defroster?

The climate system is responsible for controlling the position of the defroster actuator which is connected to the air position door in the heater plenum. This actuator controls defrost, middle and lower air vents. When it fails it can do so in the defrost position and must be replaced.

Why does my Mazda Protege heater only blow out front vents?

Eighth generation of the Mazda Protege. Heater only blowing out front vents, no heat to feet or defrost. Why? Heater working but only blows out front vents. No heat to feet or defrost.

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Ruth Doyle