heater fan replacement 1970 280SE W111.026

[Monomer]

bumping this for those of use that are undertaking w115 fan problems...

[dquance]

Hi: everyone. I have recently joined the club of non working blowers.
When checked with an ohm meter I get no resistance, so I suspect the brushes are gone. The idea of putting a replacement in from the top sounds intriguing.
However, I was wondering if there might be a way to reconfigure the A/C fan and or flaps to get it to push air through the heater core?

Thoughts from the brain trust?

Thanks

Doug

[Mike D]

You can get heat using the A/C flaps, kind of, sort of. You can not pull the air through the heater core nor push it through since it vents back out through the defrost motor, what is actually its inlet. What you can do is, open a rear window just a fraction, turn the heater levers to heat, flip the changeover switch to the A/C position, undo the clip holding the flap to the vacuum changeover diaphragm, flip the diaphragm to the "heat" position and use the A/C fan on "low" or "medium" to move the air being forced through the heater core by the flow from the open rear window into the A/C ducts and back into the car.

It works but its not exactly efficient. It'll defrost the windows and keep away frostbite. On a long or fast drive it will actually make the car semi-comfortable. Except for the poor sap sitting beside the opened window.

[dquance]

Thanks Mike, I gather that it is a bad idea, point taken.
Thanks for your input.

Doug