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      On-demand appliance repair training videos for Professional Appliantologist members Over 30 hours (and growing!) of original, high quality appliance training webinars developed and given by yours truly are at your fingertips, on topics you won't find anywhere else. Fill in those knowledge gaps, strengthen those areas of uncertainty, and boost your skills. Watch on mobile or desktop at your convenience whenever, wherever.  Ultra Short Primer on Basic Electricity, Circuits, Ohm's Law, and Schematic Reading (Length: 1:04:48) Basic Refrigerator Troubleshooting (Length: 1:10:45) Schematic Reading Workshop, 10/2015 (Length 1:19:08) Troubleshooting Strategies for Computer-Controlled Appliances (Length: 48:34) Semiconductors and PN Junctions (Length: 1:04:37) Appliance Temperature Sensing Devices & Technology (Length: 1:27:33) Voltage Measurements, Meters, Ghost Voltages, and Triac-controlled Neutrals (Length: 1:29:32) Troubleshooting with Tech Sheets, Part 1, 4/2016 (Length: 1:09:26) Troubleshooting with Tech Sheets, Part 2, 4/2016 (Length: 1:21:11) Tech Sheet Review, 4/9/2016: Bosch Speed Cooker, Amana Refrigerator, GE Glass Cooktop Range (Length: 1:22:58) Pulse Width Modulated (PWM) Switches used in Samsung Switched Mode Power Supplies (SMPS) (Length: 27:07) PWM Computer Cooling Fan in a Whirlpool Refrigerator (Length: 14:53) Understanding AC Split-phase Household Power Supplies (Length: 52:41) Troubleshooting a Samsung Electric Dryer without Disassembly using Live Tests and the Schematic (Length: 22:47) Troubleshooting a Bosch Dishwasher No-Heat Problem using the Schematic and Live Tests (Length: 15:38) Linear Motors and Linear Compressors (Length: 55:54) Bi-directional PSC Drive Motor Systems in Whirlpool VM Washers (Length: 56:52) Appliance Service Call Structure and Troubleshooting Strategies (Length: 1:00:16) The Ten Step Troubleshooting Tango and Workshop Exercises (Length: 1:35:39) Troubleshooting Ten-Step Tango Advanced Workshop (Length: 1:32:06) Ten-Step Tango Troubleshooting Workshop: Refrigerators (Length: 1:35:57) Whirlpool Duet Washer Schematic Analysis & Whirlpool Dryer Moisture Sensor System (Length: 1:03:04) Neutral Vs. Ground, Inverter Microwave, Digital Communications, Loading Down in DC loads, and more! (Length: 1:14:45) Gas Oven Service Call After a Parts Changing Monkey (Length: 36:04) AFCI and GFCI Circuit Protection Technology (Length: 41:26) Troubleshooting Samsung Refrigerators and more (Length: 1:29:58) 3-way Valves and Dual Evaporator Refrigerators (Length: 1:15:45) Split-Phase Compressors and PTC Start Devices (Length: 1:11:57) Gas Dryer Ignition Systems (Length: 53:50) Refrigerator Sealed System Thermodynamics, Part 1 (Length: 43:07) Refrigerator Sealed System Thermodynamics, Part 2 (Length 1:09:09) To access these webinars and all the other info-goodies here at Appliantology, become a Professional Appliantologist today. If you need cost-effective, time-flexible, state-of-the-art appliance technical training, check out the Master Samurai Tech Academy.
obrien1984

Water heater on/off knob cracked

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obrien1984

I am helping a friend out with her property by trying to get it fixed up. One area of concern is the water heater. It's been turned off for several months now. The valve on the gas line leading to it is shut off, and the water heater knob is in the "off" position.

I was going to try to get it fired up, but I noticed that the on/off/pilot knob is split across the top. Before I turn it on, I wanted to check here and see if this is a problem or if it's something I can ignore for now.

If it is a problem and could be potentially dangerous, can the knob be replaced, or is this a situation where one has to replace the entire control assembly?

Thanks!

P.S., the control valve looks almost exactly like the one in the link below.

ao-smith-water-heater-parts-control-valve.PNG

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RegUS_PatOff

water heater model number ?

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obrien1984

Oh, Sensei. Can't you discern this information through time and space? :rolleyes:

j/k. I'll look it up tonight when I get home.

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RegUS_PatOff

different years, ect ..

different versions of the Valve ..

to check to see if the Knob is available separately ..

Don't want to "guess" with gas :woot:

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Bullstok

If there is any doubt whatsoever: replace the gas control valve. Don't mess with trying to fix it. They are not meant to be disassembled by anyone. It's a lot easier than you may think and having a questionable valve for any reason is a bad idea. Sometimes the valve sticks and someone forces it or forgets it has to be pushed down to turn it on. (how did it crack, what else is wrong, could it cause a fire, etc etc) again, not worth it.

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Cactus Bob

here in Arizona a lot of these water heaters are in outside closets and are subject to high heat , this makes the knobs crack and even fall off

this makes it tough to light the pilot and know where to set the knob for pilot , on ,ect

BUT the knob itself has nothing to do with gas leaking , the seal is down inside the valve

years ago i had a water heater that both knobs had melted from another problem that was corrected , the valve worked fine for years and would still be ok if it had not been replaced because of a water leak

But always be aware of gas fumes , on any gas appliance even if it looks brand new .

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