Why would a torpedo heater fan turn backwards? every time I start my all pro 115,000 heater the fan starts to spin counterclockwise and the heater wont ignite. But when manually spin the fan blade clo

Jerry Magee

• 232 Answers
• Posted on Oct 12, 2008

SOURCE: 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.

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.

Good luck!

Jerry Magee

• 232 Answers
• Posted on Oct 16, 2008

SOURCE: torpedo heater ignites and then goes out reignites, goes out, etc.

We need to know more. Is this a kerosene or a propane fired heater?

SOURCE: Dyna Glo Pro RMC-KFA70TDGP 70,000 BTU Torpedo heater not igniting

The main circuit board supplies ac power to the ignitor ( black transformer looking device) and the transformer increases the voltage that is supplied to the sparking device. Make sure the wires are connected to the sparking device and the ends of this device are approximately 3mm apart and that it is in the general position near the end of the nozzle. If you do not hear a "clicking" sound it could be the main board, wires or sparking device.

SOURCE: Century Dyna-Glo Propane Construction Heater, fan stays on?

The heater is designed to continueously run the igniter , so as if there is a flame-out ,it will reignite the burner,and not dispurse unburned gas into your enviroment.

SOURCE: 150,000BTU kerosene heater won't start,just buzzes.

Your starting capacitor is bad. It's usually mounted on the side of the motor. If not, it's the thing that the motor wires go to from the end of the motor. Usually, less than $10.