D
Deleted member 220
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Not if theres a way to test blower speed dont want to buy a new motorjust for it to be the same its set on high but doesn't seem to push or flow like my older cars
live4theking
Old Man with a Hat
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If you're comparing it to new cars they don't move the air like new cars do. Bummer I know.
D
Deleted member 220
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I stated it doesn't comparing to my older cars
The pos im working on is a 78 my 71 blows more
The plastic ductwork behind the dash originally had soft foam seals where the two slipped together, usually, or "sometimes". When it goes away, more gaps between the two ducts and more air that doesn't reach the vent. Try some duct tape (no pun intended) around the mating flanges and see if that doesn't help things.
For '74, Chrysler increased the air volume of the hvac system, compared to the earlier models. Should be more flow than the '72s, for example.
If the motor is going bad, you'll smell the windings and such getting hot, plus possibly some dry-bearing sounds.
Just some thoughts,
CBODY67
For '74, Chrysler increased the air volume of the hvac system, compared to the earlier models. Should be more flow than the '72s, for example.
If the motor is going bad, you'll smell the windings and such getting hot, plus possibly some dry-bearing sounds.
Just some thoughts,
CBODY67
Another potential issue is vacuum control motors that move the air doors may not be causing the doors to fully open due to leakage if the diaphragms of the vac motors. Try moving the heater/AC controls to the various discharge positions to be sure all of the linkages are fully deploying.
Test the blower motor by unhooking the input lead and hooking it to a test lead with alligator clips to the positive cable on the battery. If you get more air flow in the various functions with the car running, this suggests that there is a high resistance problem someplace in the blower control circuit. A corroded blower relay or ignition switch is a likely culprit. (Put the system in the high fan position, you should get at least 12.5 volts to the motor)
If the vehicle has sat someplace for an extended period of time, critters may have built nests in the air box and that has found its way to the heater core or the evaporator core and is restricting air flow.
Dave
Test the blower motor by unhooking the input lead and hooking it to a test lead with alligator clips to the positive cable on the battery. If you get more air flow in the various functions with the car running, this suggests that there is a high resistance problem someplace in the blower control circuit. A corroded blower relay or ignition switch is a likely culprit. (Put the system in the high fan position, you should get at least 12.5 volts to the motor)
If the vehicle has sat someplace for an extended period of time, critters may have built nests in the air box and that has found its way to the heater core or the evaporator core and is restricting air flow.
Dave
commando1
Old Man with a Hat
Air movement in all ATC II Formals is horrible and is arguably the #1 complaint about them if the ATC II is working in the first place.
Nothing wrong with the fan. It's the same fan used by GM and they moved air well.
The HVAC Engineering Dept didn't have anyone that was awake during their Aerodynamics clssses in college.
You can run 12V directly to a new fan in these cars and there's zero improvement.
Nothing wrong with the fan. It's the same fan used by GM and they moved air well.
The HVAC Engineering Dept didn't have anyone that was awake during their Aerodynamics clssses in college.
You can run 12V directly to a new fan in these cars and there's zero improvement.
no complaints on mine....
But in rebuilding it I noted a lot of areas that could accumulate leaves and other debris as well as multiple “leak” points that can all work to kill airflow efficiency.
Sorry there is no magic bullet for this.
But in rebuilding it I noted a lot of areas that could accumulate leaves and other debris as well as multiple “leak” points that can all work to kill airflow efficiency.
Sorry there is no magic bullet for this.
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