Technical articles by owners, for owners.
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My blower motor failed recently and finding information on suitable replacements has been a challenge. This is what I did today to fix it. The project was under $100, fairly simple, and done in a few hours. Scouring the Red Dot catalog lead me to this motor. It was as close as I could find to a fit that wasn't several hundred dollars. The Red Dot 73R0554 - two speed 24vdc blower motor similar in body size but has a wider mounting stud spacing and a larger 5/16 output shaft. I cut a steel plate out with the same diameter and outer bolt pattern as the original outer plate with a larger 1.25" center hole and a matching 2-5/16" motor mounting spacing. The motor mounting nuts required were m5 and didn't ship with the motor. By carefully drilling the fan center out to match the 5/16 shaft and adding an m5 set screw I had plenty of adjustment for the fan spacing with reasonable access to the set screw for assembly. I was quite pleased at the result. It looks close to OEM, runs smooth, and blows more air. Next task, finish wiring and replace heater hoses. I hope this helps.
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