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Re: Heat works on dash, but will not switch to defrost or...
It sounds like you have a vacuum leak in the line. I would suggest taking out the heater controls and following the lines until you get a the main junctions which might just be behind the glove box. most likely one of the lines came off and all you have to do is replace the hose line.
hope this helps you and let me if you need anything else
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In the attached drawing, Part 32 moves Part 26 to direct the air flow to the desired locations. It uses vacuum to operate. The actuator may be bad or the vacuum hose my have come loose when the heater core was changed. With the car running but the blower off stick your head up under the dash on the passenger side and see if you hear a hissing sound. If so it's probably just a vacuum hose come off. AIR CONDITIONING AND HEATER UNIT BODY Fits DYNASTY LASER LEBARON NEW...
I assume your heater setting is electric control, if so either your defrost and floor heat switch failed or wire problem.
For the air not hot, check the heat control valve on the top of the hose it should be in front of the firewall. I don't know your car is using mechanic valve or electric control valve. Anyway check there first.
Could be the control switch itself. Or possibly the actuator that moves the door from defrost to heater. With the heater on, try switching from defrost to heat and try to hear if you can hear anything in the dash operating.
Either the heater control valve or the vacuum switch.
If you look down under your dash towards the glove box you will see the heater core cover. On top you will see a lever, conected to a rod.
If you pull that as you have your blower fan on you should be able to manually adjust that lever until heat is flowing.
Please let me know.
The "blender" would refer to the blend actuators that change the flow of air from floor to vent to defrost or combinations. Properly working blend doors will allow you to direct air to the dash vents, the floor, the defroster, the floor and defroster or the floor and dash vents. If it is not working the heater will still work but you will hae no control oer where the air flows.