Question about Frymaster Dean MJH50-SD Deep Fryer

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Only one side works

The right side of the fryer works. When I turn the the left side the blower starts but the ignitor does not work. I cannot see any flames through the glass. The right side (the working side) displays help when the left side is turned on.

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Re: only one side works

From what you describe, either the ignition module, the ignition/pilot/flame sensor assembly, flame relay, WIRING, 24 volt supply (check the fuse on the left ignition module!!!), with both sides off, there should be two led's lit on the board. One is the 12 volt indicator, the other the 24 volt indicator.

On the wiring side of things, at the back of the printed circuit board (pcb) are two jacks. They are 12 pin keyed jacks. part of this wiring harness also goes to the power jack connection into the transformer tray. The rear pcb jacks, and the female PROPRIETARY pins get damaged from the oil, humidity, and even spices used in food preperation. There is also THE EXTREME HEAT DAMAGE that occurs over time to both the rear jacks and the pins of the jack! THE PINS ARE OF A SPECIAL metric size that fits ONLY that weathertight plastic jack. The pins take about a month to special order FROMGermany, METRIC, AND NO domestic pins can be substituted or work!

A set of speicalized pin removal tools are needed too for these particular pins to be removed from the plastic jacks, replacing a pin now also requires a specialized crimper too for each wire male or female pin!

Pay special attention to your ignition and flame sensing circuits! From the top left hand corner you will see the high voltage lead, a white and a green wire. Make sure the green wire is securely mounted on the circuit board ground terminal. Also make sure the contact of the green wire to the bottom of the pilot/ignitor/flame sensing assemby is also good!

Remember the high voltage spark is relient upon that green wire! Make sure the high voltage line is good, DUH TURN THE POWER OFF before playing with it!

Make sure both connections to the ignition module and pilot assembly rod is clean and tight! That white wire on the top if the pilot assemby is the flame sensing line. That white wire plugs into the ignition module on the uper left hand side, oposite of the high voltage line.

If you have access to a high quality electrical meter, one capable of mesuring MIRCO AMPS, not milli-amps, then put it in series with the white wire and the ignition module. 3 micro amps is the minimum to satisfy the flame sensing circuit needs of the ignition module.

Replacing that pilot assemby requires that meter talked about above. BE VERY CAREFUL WITH THE ASBESTOS GASKET on the ignition assemby, pilot/ignitor/flame sensing rod. If the gasket is damaged (very brittle) in any way and still used, THE FRYER WILL POP AND BACKFIRE! This part must be sealed properly, AND ALLIGNED WITH A MICROAMP METER to work and ingite properly.
I strongly suggest you call a qualified commercial kitchen appliance mechanic!

Posted on Feb 05, 2009

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Re: only one side works

Your control board is bad or one of the relays is bad.

Posted on Jun 12, 2008

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