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Is there a mechinisim behind the blwnd door?A/C evaporator plugged with debris?
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Weak electric power to HVAC blower motor?
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So i replaced the blend door and watched it move with adjusting temp.
I also put a new heater valve/ solenoid with 2 vac lines yesterday i have vac and power 14v on white but .(008 - 0.010 0.011 0.013 .014 consistant )on black i tried jimmy'ing it around to see if it was a chaff or break but no fluctuation it seemed normal almost from .(008 to .010 to 0.11 .013. .014)(still consistant)but nothing when jimmying it around like still read .008 to .014.
When turning to cold i belive the plunger is suppose to suck in on heater valve but mine does not but i have vac and power so im a little confused.
Im assuming the blend and the heater valve/solenoid are some what connected and i think its mixing hot and cool air
thinking does the gear that the blend door mounts to is bad not just gear but the whole mechinisim that sits in that box ? Also the stat does seem to work opens 1 line before 210 and drops 1.5 lines. 195 stat 16 psi cap i also noticed the coolant looking into the radiator does not flow at all from driver side to pass. Water pump does work and it does not over heat. No vac leaks
Going by memory here, but the solenoid should just have a voltage and ground to it. If you have vacuum to the heater valve when the panel temp dial is in the “MAX” detent (and no vacuum when it isn’t) then it sounds like the solenoid is working correctly.
If the spring-loaded plunger on the valve can be moved up and down with marginal effort, then the valve is likely fine. Are the vacuum lines connected correctly on the solenoid?
Top line is from the PCV fitting, bottom one goes to the water valve.
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The valve only closes to shutoff coolant flow to the heater core to maximize a/c performance. If the plunger is down, the valve is open and shouldn’t impact coolant flow provided that the hoses are correctly installed.
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The blend door just sits in the box, no gears or anything. If the position indicator dial on the actuator is turning smoothly, then that should rule out any binding in the box.
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So i have no vacume at the valve i have it at the solenoid on the fire wall i switch from hot to cold on max and the plunger does not go up. Im going to double check to see if anything bindes. I did see it move all adjustments the ac evaporstor got some debri in it not giant but i cant get a light in there and try to see through it withouth taking dash outyou have vacuum to the heater valve when the panel temp dial is in the “MAX” detent (and no vacuum when it isn’t) then it sounds like the solenoid is working correctly.
i also noticed the coolant looking into the radiator does not flow at all from driver side to pass. Water pump does work and it does not over heat. No vac leaks