Air selected switch doesn't seem to work and blower air seems restricted

SOURCE: 1991 chevy g20. 5.7l v8. air conditioning does not work. the blower and switches seem to work fine but it does not cool and only blows out of defrosters.

Blowing out of the defrost is a vacuum problem. You have a leak between the motor and the heater controls. Most likely needs to have the A/C system charged up.

SOURCE: 1990 Motorhome on a Chevy P30. Heater control

the the vacuum line for a broken one, check from the engine compartment first, check the fuse and all relays, check the a/c doors make sure they are not jammed.

SOURCE: My heater fan switch won't turn on blower and I

thermostat or the divider door

SOURCE: I have a 1999 Chevy Suburban. It has a dual air

Sounds like the blower motor resistor. It should be mounted close to the blower motor. The blower motor resistor may run around $50.00, you may need to replace the plug, dealer item, around $60-70. Shouldn't be $1000.

SOURCE: heater and air conditioner blower switch.

Check the resistor first. It may be bad. Should be under pass. side of the dash close to blower motor mounted in bottom of evap case. Remove it and try known good one first before going at the switch. If it works on high then the switch may be okay. Good luck.