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I have a dayton torpedo heater. It will not start on its own, you have to spin the fan then plug it up real quick. It will work fine once it is going but you have to spin start it every time. Need help as to what needs replaced and what it looks like.

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Looks like you need to replace the fan motor as it has gotten to the point of not starting on its own, I would bet the amp draw gotten a little bit to high and the motor windings have started to stick or fry, replacement of the fan motor is what I would recommend, hope that helps

Posted on Jan 20, 2009

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Thanks for using Fixya and for the great rating. Please consider a testimonial. Thank you.


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Dayton 3EV51 torpedo heater

Dayton heaters at one time were manufactured by DESA or a predecessor and labeled DAYTON for Grainger. I have been unable to find any specific reference material to "Dayton 3EV51".

There were 2 types of motors used. I suspect your heater has a starter relay. The solid state relay was used to allow the energizing of the start winding which would allow the motor to achieve approx 80% of rated speed, then the relay would de-energize the start winding to prevent overheating. The relay is not attached to the motor, except for the wiring.

5ef4624.jpgThis is what the starter relay looks like. If yours has one check to see if it is energizing the starter windings at start-up. If not it is probably defective. The part is still available at, I think, but today's replacement part looks slightly different.

If your motor does not have the relay, then the motor has an internal start-up system which is not serviceable, but the motor is probably still available. Most of the time the motor's part number is printed on the label.

Good luck!

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