I have picked up this working used OEM Delco-Remy "AIR" switch that is used with a Harrison fresh air heater. Note the ceramic/clay "resistor" (correct name?) on the backside and the condition that it is in. Is this a concern when the switch is in use? If so, is there a way to remedy this situation?
I think that as long as the wires are intact it should work as designed, to dissipate heat. It does look a little crusty, as some of the ceramic material has chipped off. Maybe wire it up on the bench and test it.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
Be aware that the coil will get VERY hot during use as it controls the fan speed. DO NOT TOUCH! I learned that the hard way! That's why later designs of blower speed control resistors are mounted inside the air box in front of the fan output. Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
Yep burned my fingers on that as well .mine is not as bad as yours but I thought of trying an epoxy type glue but never looked into it .It would have to be a high heat coating ,or possibly a heat shield so one would not touch under the dash with your fingers and also protect from igniting something on fire.
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
Add a small tube from the heater outlet and point it towards the switch to keep it cool. It only gets hot on the lower speed settings. The ceramic absorbs the heat, thats what it needs on it, not epoxy.
Thank you Jerry. The answer was sitting in my shop. I heat with a wood stove, and also have a maple syrup sap boiler in this space. Refractory cement is a staple to perform routine maintenance on both fireboxes. Mission accomplished.
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
