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      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.
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      [Webinar] Samurai's Sealed System Sleuthing Secrets - 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. That means quick n’ dirty techniques for diagnosing sealed system problem using strategically chosen and skillfully interpreted temperature measurements.  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) If you attended the first webinar in this series, this is your payday! We’re going to apply that keen, penetrating insight you now possess into money- and time-saving shortcuts you can use to diagnose real-world refrigeration systems on service calls. See this calendar event for more details                   
Southern

Suburban #HF50B Circuit Board

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Southern

My sister has a Suburban furnace and the fan motor kept running with no heat. She was told that there were no replacement parts available for the furnace and the only option was to replace the entire unit with a more conventional style furnace. This would require re-work of the duct work and She was quoted $7000.

I got the circuit board and there are some burnt traces on the edge connectors. I can try to repair the edge connectors but I feel that what ever caused them to burn in the first place is still the problem.

The circuit board has HEC Carborundum 114-500-3022 silk screened on the board.

Any info would be appreciated.

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jumptrout

Could just be age that caused it to break down.

If the heat exchanger in the furnace is good,try a repair on the board.

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Southern

It doesn't appear to be age related, the rest of the circuit board is in great shape (no yellowing or burn marks). Two of the edge connectors that fried was a jumper, the trace didn't go thru the circuitry, the third edge connector that is damaged was adjecent to the jumper traces. I suspect that what ever is connected to the other side of the jumper malfunctioned causing the edge connector to "melt".

I will try a repair on the board since I have nothing to lose.

If someone has a schematic for the Suburban furnace that would help me.

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jb8103

I'd never heard of Suburban. Google search says they're RV furnace manufacturers.

http://www.rvcomfort.com/suburban/about.php

Where's this thing installed?

Anyway, $7000 sounds, how shall we say, just a tad on the high side.

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Southern

The builder of the Condo my sister lives in used an RV type of HVAC unit since it was installed in a small space near the ceiling. The $7000 included a new regular sized HVAC unit and reworking the duct work. Apparently there aren't many contactors willing to due this work since it is dirty messy job to tackle.

I did some checking of the circuit board and there is a small transformer that has the primary windings shorted. Without a schematic it would be a crapshoot to attempt a repair.

I have contacted ICM controls to see if they offer a replacement circuit board, I sent them photos of the board showing the manufacture and model number.

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jb8103

Or maybe go through a local RV dealer. Things are quiet for them right now, they might actually help you out.

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Daveb1972

Honeywell makes a pretty good universal integrated furnace control, part number is S9200u, and is made to control HSI induced draft furnaces, and include blower control. If you send me a picture of the control, and all of the numbers visible on it, I can see if there is a direct crossover to this or another control. I have used this control in several applications. The existing control may have been the victim of water contamination causing the short, or often they will blow out a relay terminal. post detailed pictures, and I can help further. Include pics of the furnace and I'll see what I can do about better schematics. I would avoid "fixing" boards because of the nature of the electronics, and the need for the timing logic to operate correctly for safety. An example is if the unit fails again, but fails to open the gas valve circuit, the unit will run burner, without blower, and cause a fire, same if the control keeps gas on, if it fails to light, boom....I have seen modules do this, so NO MODIFICATIONS TO THE BOARD should be attempted. Not worth the risk. The universal boards often will satisfactorly replace a hard to find board, and if installed properly, they are safe, and the liability is then on the board manufacturer.

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Southern

Below are photos of the circuit board:

img0004py.jpg

img0005ik.jpg

img0006xm.jpg

I will ask my sister if she can take some photos of the furnace.

Any assistance is appreciated.

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