Question about Hobart C44a Commercial Dishwasher

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Gas burner won't lite to heat wash water

Temp only 123 on wash water

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Asuming the gas isn't turned off.
The usual cause is a dirty or blocked air inlet to the combustion box.
Fun to get at as it's behind the conveyor drive motor. When you remove the intake baffle from between the fan and it's rectangular inlet, make a note of how many holes are covered and open. You might have 8 open and 4 half open for instance. Thoroughly clean the inlet, and fan blades and housing.
It's probably choked enough to run a rich mixture, which is reluctant to light. You may even have a backfire when the unburnt gas ignites in the exhaust plenum.
Any further in and you should be a certified gas technician.
There is an interlock switch on the burner box. If you need to go inside the box, shut off the gas. It will allow you to monitor the ignitor and hear and see the ignition arc. Process of elimination from there. Prove for good air, correct manifold pressure, ignition and flame monitor.
Remote chance its the flame rod oxidised. Have new gaskets handy if you are removing the ignitor rods, and place back exactly where they were for correct gaps of igniter and flame rods.

Posted on Mar 23, 2014

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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