Whole house fan replacement motor question.


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Old 04-15-24, 10:58 AM
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Whole house fan replacement motor question.

The motor gave out on our whole house fan. It is a Dayton motor. The wiring has two Romex wires coming in and a wire under all three terminals although the diagram says you only use the common and either of the side terminals. itís only wired to a timer dial. Itís quite archaic looking as everything else I find in this house.😂

Iím trying to find a replacement motor. But I was wondering why there was a wire under each terminal when itís only connected to a 1hr timer switch.?





 

Last edited by PJmax; 04-15-24 at 12:42 PM. Reason: resized/added 3rd labeled pic
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Old 04-15-24, 12:47 PM
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You would run a three wire cable if you wanted to remotely control hi/low fan speeds.
In your case they used the white wire from one cable as neutral. Black is hanging in the wind.
On the second cable they used white for hi and black for low.

Is the motor 100% dead..... quiet.... no hum ?
You could try swapping the H and L wires to see if one of the motor windings is bad.

Otherwise... do you want a single or two speed replacement ?
I opted to maintain a high speed motor as my louvers rattled when on low speed.

You can search for a motor by entering specs into a search engine.
I use motor catalogs. This would be a good replacement. Important specs match.
Replacement motor
 
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Old 04-15-24, 01:28 PM
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Thank you so much for your reply. The motor starts clicks and stops starts clicks, and stops never gets up to full speed. I definitely see some burnt windings. I would just do a high-speed replacement that motor looks perfect. I actually thought I looked at that one yesterday myself.
 
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Old 04-15-24, 02:01 PM
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That exact Dayton motor shows as over $300 from Grainger.
Supply House is a trusted source for DIY'ers.
 
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Old 04-15-24, 02:32 PM
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Yeah I saw the same price at Granger as well. Thatís why I was hoping to find a cheaper replacement instead of replacing the whole fan.
 
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Old 04-20-24, 01:04 PM
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I want to thank you again for the recommendation of that motor. I bought one on eBay brand new for $120 just got done installing it.. super quiet obviously I ran on the low side last time so itís actually faster drawing more air!! works great thank you again.!!
 
 

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