Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 4 of 4

Thread: Pool heater won't ignite ...

  1. Back To Top    #1

    Join Date
    Apr 2017

    Pool heater won't ignite ...

    I have a rheem M407 pool heater. It has electronic ignition and controls.

    Last season worked fine. This season - won't fire up.

    The controls all seem normal. the temperauture is set above pool temp. The "spark" is showing on the LED panel and I can hear the igniter clicking (sparks?).
    I can smell a faint whiff of gas from the pilot tube after I set the unit to call for heat. but no ignition. No error codes either.

    Before I call someone, I thought I'd run the problem by this forum in the hope that someone experienced what I am experiencing and can suggest a few more options.

    As far as I can tell - nothing is wrong (gas valve is on).


  2. Back To Top    #2
    borjis's Avatar
    Join Date
    Aug 2014
    Pacific NW

    Re: Pool heater won't ignite ...

    Have you taken the front panel off to examine if any spider webs or other stuff is in there?
    16x32 IG Vinyl, 13,000 Gals. Hayward S-244T sand filter, SP2810X15 pump
    (1.5 HP motor) Raypak PR266AEN (266k btu) gas heater. TF-100 Test Kit.
    Dolphin E10 Cleaning Robot.

  3. Back To Top    #3

    Join Date
    Sep 2016
    Lancaster, CA

    Re: Pool heater won't ignite ...

    Try lighting it with a match while it's trying to light. See if you can see a spark.

    ~14k Gallon IG Plaster (old)
    Hayward DE 4280 Filter
    Pentair Superflo SS Pump
    Built 1993
    Old Broken Heater that needs to get replaced!

  4. Back To Top    #4
    TexasDeano's Avatar
    Join Date
    Aug 2015
    Frisco, Texas

    Re: Pool heater won't ignite ...

    I had similar issues. We (me and my PB) narrowed it down to a overly sensitive flow meter. So when I heat my pool now, I just make sure to bump up the pump's RPM's to increase the flow rate.

    BTW, my heater is a Pentair heater and I found a really useful troubleshooting flowchart in the back of the user manual for it.
    18'x24' Rectangle (3' 6" to 5' 5") - 11K gal. Saltwater w/ Blue Granit Pebblesheen
    Pentair equipment (IntelliFlo 3050 VS/SVRS Pump, 60 sq. ft. DE filter, Intellichlor Salt system, MasterTemp 400000 BTU heater
    Easy Touch 4 w/ Screen Logic automation, 3 GlowBrite LED Pool Lights) My build log

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts