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    • Samurai Appliance Repair Man

      Webinar Recordings Index Page   10/03/2017

      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.
    • Samurai Appliance Repair Man

      [Webinar] Practical Refrigeration Sealed System Thermodynamics - 10/30/2017 @7PM ET   10/19/2017

      Having laid some theoretical groundwork in the last webinar, we're going to focus on practical considerations in this one. Here are the topics we're going to discuss: Review homework from the first session on 10-2-2017. Home refrigerator practical design and operating rules-of-thumb useful for troubleshooting Practical application exercises Troubleshooting scenario exercise Techniques for making system temperature measurements for determining superheat and subcooling Sealed system diagnosis homework assignment (to be reviewed in the next webinar in this series) See this calendar event for more details                   
briandmiller

Rheem Classic 90 Plus (model #: RGRA-10EZAJS) - Blower won't shut off

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jb8103

If I'm 100% confident about anything, it's death and taxes.

Let me put it this way, we've seen no evidence of anything faulty outside the Black Box. My next move would be to replace it, but I could be wrong.

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jb8103

with the 24v 2A Fuse near the Controller removed,

OR with either of the 24v power wires to the Controller removed,

Turn power ON...

Does the Fan still run ? (shorted Relay Contacts)

Also did you run this test? It will help prove the Black Box is bad, before you spend hundreds on a new one.

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RegUS_PatOff

I just realized that the fan does turn off during the initial period when the thermostat calls for heat while the burner is turning on and getting warmed up and then the fan comes back on and stays on. Does this indicate something else to look at as the source of the fan staying on or is that happening somewhere else in the schematic?

looks like a bad Controller

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briandmiller

Also did you run this test? It will help prove the Black Box is bad, before you spend hundreds on a new one.

In reviewing this post I realized that I had not done this correctly. I had only removed the wires from the thermostat, not the power wires. I just went back and pulled the fuse off the board and the fan does not come on in this state. Any clues on what that tells us?

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RegUS_PatOff

looks like a bad Controller

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briandmiller

I'l know soon. ordered one from Amazon. Should be here today.

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jb8103

In reviewing this post I realized that I had not done this correctly. I had only removed the wires from the thermostat, not the power wires. I just went back and pulled the fuse off the board and the fan does not come on in this state. Any clues on what that tells us?

Actually I quoted the wrong post from Reg. I wanted the one asking for voltage across the relay. But anyway, if the limit switches proved to be closed, and with the blower turning off at start of sequence proving the relay is functional, with the thermostat wires out of the circuit, with the IFM, valve and burners working as advertised, there's nothing else left that I can think of.

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briandmiller

New board got the furnace running fine. Thank you all for your help.

Now I just need to figure out what's going on with my Honeywell TrueSTEAM humidifier.

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applianceman18007260692

Glad you could git her done :thumbsup:

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jb8103

New board got the furnace running fine. Thank you all for your help.

Now I just need to figure out what's going on with my Honeywell TrueSTEAM humidifier.

But...there can't possibly be anything wrong with a Honeywell TrueSTEAM humidifier!

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