[Healeys] 100 heater motor or switch problem

Michael Oritt michael.oritt at gmail.com
Thu Oct 25 10:26:09 MDT 2018

The fan motor in my heater worked nicely all summer but naturally chose to
crap out once cooler weather arrived a few days ago and I'd like some
advice from those 100 drivers who have previously removed/remounted their

I have verified that power is getting to the heater lead from the fusebox I
installed in the engine compartment, and the green wire disappears into and
through the firewall, apparently intact Without disassembling the heater I
cannot access the rheostat switch to trace whether it or the motor is the
issue and before I pop off the three spring clips that seem to hold the
heater faceplate to the rear plate I would like to know that doing so will
allow me to get to the heater's innards.

Also I would appreciate learning whether reassembly is the reverse of
disassembly as those clips, esp. the one at the 12:00 o'clock position, do
not look like they will be easy to get back into place with the heater
mounted to the firewall, which leads me to my last question: How is the
heater unit fixed to and removed from the car should I need to access the
fan motor? Aside from one screw going through an ell-bracket at the top of
the faceplate I see no other fasteners projecting through the firewall.

Thanks in advance--Michael Oritt
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