Heating AC and Engine Cooling
Air Conditioning and Coolant

What would cause the dashboard air conditioning vents to not blow if the back vents work just fine?

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The most likely cause would be a vacuum leak at the rear of the engine or a defective selector switch.

The moveable "baffle" inside the dashboard is not redirecting the air flow as it should. It's operated either by vacuum or an electric motor, in either case, repair is going to require the removal of the dashboard.

There are heater doors on the heat blower box that direct the path of the heat. Apparently the heater door to the floor vents is stuck closed.

This is a very common problem and you need to check for a vacuum leak, broken vacuum line or a loose vacuum line......

Either you have a blockage present or your vents on your sewer lines have become blocked or you need to install more vents.

There are two separate accumulators one for front and one for rear

Low freon, likely means you have a leak.

The heater core or air conditioning core is broken and leaking fluid into the heating unit. simple to fix. just install a new heater core.

05 silverado fan works but no air from vents. This is an easy fix most likely. I would take it to your local Chevy dealership or auto repair shop.

The fuse box is on the right side of dashboard when door is open, tail light fuse will cause tail and dash lights to go out.

If the system has a full charge then the thermister is most likely the cause for it not working.

Some cars have a knob for the headlights. If this knob is turned left or right when pulled out, it changes the brightness of the dashboard lights from off to full brightness.

It should blow through the floor vents. Modern vehicles generally use movable baffles in there HVAC systems, to direct air flow where the controls indicate. If the controls allow airflow to the floor, but nothing flows out, there is a malfunction between the control switch and the actuator that directs the flow.

Could be that your heater core is leaking May also have a plugged evaporator hole.

Yes and no. It was either a special order from the factory and built in to the dash of the mustang or it was dealer installed where a box would hang above the passenger's feel which connects into the air vents. Normal base Mustangs and even some fastbacks did not have air-conditioning.

Any of the following can cause this......... 1. Bad a/c - heater controller.. 2. Bad a/c - heater controller inside door operation.. 3. Bad, broken or cracked vacuum line/lines..

A blown fuse can make your dashboard lights to not work in your 1993 Chevy Blazer Tahoe. A burned out bulb can also cause this.

Steam may be coming out the air conditioning unit if the engine is overheating. The best thing to do would be to shut the vents before any hazardous fumes begin to come out.

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