The days of Monkey Boy Service Calls are over...

Click here to check out our fun short course and learn how to get the most out of Appliantology.

FAQs | Repair Videos | Academy | Newsletter | Podcast | Contact

Stay connected with us...

Samurai on Facebook - become a fan today! Sign up for our free newsletter and keep up with all things Appliantology. Subscribe to our YouTube channel for lots of appliance repair tips and help! Follow the Samurai on Twitter and get timely morsels of Appliantological Wisdom! Subscribe to our MST Radio podcast to learn secrets of the trade.
  • Announcements

    • 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                   

Archived

This topic is now archived and is closed to further replies.

ornrydaddy

Rheem Power Vent Mod# 21VP50-1P acting strange....

Recommended Posts

ornrydaddy

I was working in the utility room last night when I noticed my Rheem Power Vent water heater was acting strange.  I could hear the fan motor running as it normally does during the heating cycle but the flame kept turning on and off until the thermostate quit calling for heat.

During the call for heat from the thermostat, the glow plug came on and then the gas valve would open shortly thereafter to ingite the flame.  The flame would burn for about 30 seconds or so and then suddenly stop with a click (I think the gas valve closed).  Then almost as soon as the flame went out, the glow plug would come back on and then and with another click from the gas valve the flame would reignite.  This cycle continued until the thermostat stopped calling for heat.

The unit is still making hot water (thankfully) but I'm fearful that the over cycling will cause a premature failure of control components.  I had to replace the gas valve about 2 years ago and replaced the control module last October.

I suspect there is a temperature sencor somewhere that needs replaced.... any help or information would be appreciated.

Thanks,

Eric

Share this post


Link to post
Share on other sites

Need appliance parts? Call 877-803-7957 now!

forestone

Try cleaning off the thermocouple and the flame sensor (since you'll be in that a same area) with steel wool. Remove them from the framework to clean them properly. They're usually held in place by a single screw or snap in place by a mounting clip. Be careful not to brush up against the hot surface ignition device (glow plug); they are brittle and the way some are designed, an "arm" could snap off if caught or bumped by a tool, or handled roughly. (That's right, I can learn from my mistakes)

If that doesn't do the trick, then replace the thermocouple (first), then the flame sensor (second, if the thermocouple repl didnt't solve the problem).

Applianceman has an excellent video demonstrating this in the HVAC forum and here's the link--http://applianceguru.com/forum13/22527.html

Good luck. If you still have the same symptoms after doing this than the next step is to look at the draft inducer system and its vacuum/end switch(es). The good news is that you've already replaced the most expensive parts of your heater, so everything should be gravy from this point.

Steve

Share this post


Link to post
Share on other sites
ornrydaddy

Thanks for the tip.

As it turned out, I ended up replacing the glow plug.  It turns out that this unit doubles as a hot surface igniter as well as a flame sensor.  Once it was replaced the unit works as normal!

Share this post


Link to post
Share on other sites
forestone

You're welcome. That's great. What I wasn't paying attention to is that your heating device is a water heater not a forced air furnace because I got all excited with my first post. However, like all gas heating devices, they have common components and problems like intermittant call-for-heat cycling. This is why simple things (and inexpensive) procedures like regular cleaning of thermocouples/thermopiles, flame sensors, and filter replacements; are so effective at keeping your heating equipment humming smoothly. :buddha:

Share this post


Link to post
Share on other sites