Question about Dayton E51 Oil Filled Utility Heater

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Heater works fine but you have to give the fan a little push in order for the unit to start.....can you help?

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This doesn't have an easy fix to it. Sounds like the fan motor is very weak, probably the brushes in the motor are worn out and I doubt you can replace just the brushes. Probably have to change out the fan motor. Good news is these  are common heaters and parts should be available. Try Grainger on line or even Dayton on line and see if there is replacement parts for the fan.

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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.

This 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 www.reddyparts.com, 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.


Posted on Nov 15, 2010

  • Dcramer531
    Dcramer531 Nov 15, 2010

    Sorry the picture for the relay did not come out. It is a small black rectangle box with 2 screw in hte top and 2 mounting screw on the bottom. It has 4 lines of numbers and letters with p being the firts and 42 being the laas digits on the numbers. If you need this part I can get you the numbers, but it doesn't sound like the relay to me.

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