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Having sorted my Green P38 heater distribution motor & gears recently, it's now having issues with the blend motors. Firstly, it's not the flaps - they both move freely.
Left one is working fine when I power it with a 9V battery & measure the pot resistance. HEVAC sometings bitches, but cleaning the connector sorted that.
The problem child is the right blend. Found the potentiometer was giving intermittent readings, so took it out & measured it across the full range. Thorough cleaning & resoldering it to the PCB cured that. Moving the motor with 9V battery now giving smooth feedback from end to end, and expected partial range when re-installed (about 1.2k to 6.5k ohms). Plugging back into HEVAC results in a current fault & feedback stuck at 40%, so it now looks like connector issues to the motor.
Also ran the car and moved the motor using 9V battery. Vents go from hot to cold with no problem. Set it about 40% for now, so the air is cool but not too cold !!
New 16-way connector on order, so will be replacing that. Planning to check & re-solder the HEVAC side as well, but already did that back in January when dash was out.
Left one is working fine when I power it with a 9V battery & measure the pot resistance. HEVAC sometings bitches, but cleaning the connector sorted that.
The problem child is the right blend. Found the potentiometer was giving intermittent readings, so took it out & measured it across the full range. Thorough cleaning & resoldering it to the PCB cured that. Moving the motor with 9V battery now giving smooth feedback from end to end, and expected partial range when re-installed (about 1.2k to 6.5k ohms). Plugging back into HEVAC results in a current fault & feedback stuck at 40%, so it now looks like connector issues to the motor.
Also ran the car and moved the motor using 9V battery. Vents go from hot to cold with no problem. Set it about 40% for now, so the air is cool but not too cold !!
New 16-way connector on order, so will be replacing that. Planning to check & re-solder the HEVAC side as well, but already did that back in January when dash was out.
