Isn’t it time to know what you don’t know?

Click here to check out our structured, online appliance repair training courses for rookies and experienced techs.

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] 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                   

Archived

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

TheFixer300

Sometimes it gives heat, Sometimes it won't

Recommended Posts

TheFixer300

i am having problems again this year with my pulse21 about 3 years ago, had a lennox tec out, and after swapping several things, it was determined my air flapper was bad, and he replaced it. worked fine for about 3 years, and again comes the cold weather, and the furnace won't kick on. i get into the air flapper area. (only takes about 3 or 4 minutes to get all the screws/bolts out and get the part out. it wasn't that bad, but i cleaned it, and put it back together, and back in place. kicked on the furnace, and it fired right up. worked for maybe 4 cycles, and quit again. i started looking for obstructions in the air in/out and vacume lines. nothing wrong. when you reset the power to the main unit, you can hear the air chamber blower kick on, and the sound of a pulse heard, but when you hear the click for the spark to come on, nothing happens. after several tries, the main module's light blinks off/on. so a reset is necessary. i stumbled on getting the furnace to work, but seems to only work for maybe 2 days. then if i do this again, another 2 days. can anyone shed some light on what may be occurring.  i take off the air flapper, and clean it. (not really dirty) but before i screw it back in place. i put a small vacume cleaner up to the (not sure what this is called  the unit that the air flapper assembly fit's on) and press it as tight as i can to the opening, (a small vacume, and the hose end is just the right size) that leads to the inside. nothing can be heard coming into the hose. but after i do this, the furnace runs with no problems for like i said a couple of days. what in god's name, can the vacume cleaner procedure have to do in getting it to run. what is inside the unit being vacumed out. ??

anyone have any ideas on what i can replace in there or what is happening. 

  thanks  Jim

Share this post


Link to post
Share on other sites

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

kdog

the way you describe the problem,souns as though you may have a problem with the burner ignitor as it likely has a build up of carbon so it does not recognize the burner is lit and sends the control into a lockout mode.

Share this post


Link to post
Share on other sites
Crouching Tiger

[user=15682]TheFixer300[/user] wrote:

you can hear the air chamber blower kick on, and the sound of a pulse heard, but when you hear the click for the spark to come on, nothing happens.

When you hear the sound of the first 'pulse' this is the only time there is a spark, after that combustion is self-sustaining.  How soon after ignition does the 'pulse' sound stop? - before of after the main blower comes on.  My own Pulse furnace had a plastic 90' fitting cracked where the differential pressure switch hose connects to the exhaust tubing.  Make sure you are absolutley sure there are no restrictions or cracks in the tubing or hoses - this includes the condensate drain tubing.  Lennox also prefers you to change the air flapper every four years regardless of condition, although my unit is 10 years old and I have never done it.  Also check for any possible changes to where the intake/exhaust tubing terminates outside - exhaust could be recirculating with intake air stopping combustion. 

Share this post


Link to post
Share on other sites
jahjahbinks

i have had to deal with lennox on this problem /// the bottom line was to replace it

the flapps wear to fast

 

INFO COMES DIRECT FROM LENNOX , ALSO UNABLE TO REDUCE NOISE

PRODUCT // DEFECTIVE

Share this post


Link to post
Share on other sites