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Thread: Heater question

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    mitch08's Avatar
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    Heater question

    Hey all,

    So of course this year my heater isnt working. 250k btu natural gas heater. Older than I am. Ok not quite. But it has to be over 20 years old.

    The pilot light is on but the heater wont fire up.
    I have American Home Shield. They have been great for my components. They sent a heater guy down.

    He said I needed 2 parts:

    1) Pilot generator assembly
    2) pressure switch

    Im sort of in a rush to get this thing going cause we have a huge party this weekend.
    So just looking to see if Im being pointed in the correct direction. Do these parts make sense for a heater that's pilot runs without issue but burners wont fire up at all?

    Thanks a lot!
    18x38 Inground Liner (25k gal) Paver surround, multi-speed pump, DE Filter, Raised spill over spa, TF-100

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    Pool Tool's Avatar
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    Re: Heater question

    Do you have any specifics on the heater, manufacturer and model #?
    16' x 32' (21100 gal), vinyl, 1.5 hp Hayward SuperPump,
    Tagelus TA60/60D Sand Filter, Raypak 399K Digital Heater, TF-100

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    Re: Heater question

    Quote Originally Posted by Pool Tool View Post
    Do you have any specifics on the heater, manufacturer and model #?
    Thanks. Its a Pentair Minimax 250m natural gas heater.
    18x38 Inground Liner (25k gal) Paver surround, multi-speed pump, DE Filter, Raised spill over spa, TF-100

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    Re: Heater question

    The pilot can be lit but not be supplying enough millivolts to actually run the system so it is possible that it has an issue. As for the pressure switch, I'm guessing they tested the entire safety circuit to know that it was bad.
    Paul
    http://www.gastekservices.com A word of caution: When working with gas and electrical you might want to consider a licensed contractor. Consider the value of your life and others around you. If you would like to provide a review of the help I provided, please use the following link to leave a review. gastek - Google Search,

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    Re: Heater question

    I have the Pentair Minimax Plus 400 heater. This is my number one problem with it. Can you tell us what lights on the front pane come on and which don't?

    Almost every year it will not fire up at all or fire up and go out shortly after and then try to re-fire.

    The most common issue for me is the burners are dirty. This could be due to spider webs blocking some of the orifices or even dirt and soot.


    Below are the instruction to remove and clean the burner assembly via a service manual I found online a few years back.

    To clean it you will need to:

    1. Turn off the gas supply
    2. Disconnect the gas union at the heater
    3. Remove the gas pipe installed into the gas valve.
    4. Remove the gas valve holding bracket.
    5. Remove the gas valve wires.
    6. Disconnect the ignition wire.
    7. Slide the burner tray out.
    8. You can remove the gas valve if you need to check the inlet and outlet screens (you will have to remove the pilot tubing).
    9. Remove the bracket that holds the burners in place.
    10. Remove each burner and check for any blockages.
    11. Remove the main burner orifices and check for blockage.
    12. Remove the pilot orifice and clean it (Do not use any sharp objects. It will destroy the designed orifice size!)

    I also will normally take the top cover off and vacuum the heat exchanger to remove any soot from there.

    If your heater is as old as you say it is possible it has gone a long time since it was last cleaned.
    25,000 gallon in ground white plaster- 1 1/2 HP Pentair SuperFlo pump - 60 sqft FNS DE filter (with FiberClear), 1999 Sundance Optima 850 hot tub.
    Manassas Park, VA

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    Re: Heater question

    Quote Originally Posted by ps0303 View Post
    The pilot can be lit but not be supplying enough millivolts to actually run the system so it is possible that it has an issue. As for the pressure switch, I'm guessing they tested the entire safety circuit to know that it was bad.
    Ok great. Thx a lot. Hopefully they will be back quick to install those parts.

    - - - Updated - - -

    Quote Originally Posted by Rocco View Post
    I have the Pentair Minimax Plus 400 heater. This is my number one problem with it. Can you tell us what lights on the front pane come on and which don't?

    Almost every year it will not fire up at all or fire up and go out shortly after and then try to re-fire.

    The most common issue for me is the burners are dirty. This could be due to spider webs blocking some of the orifices or even dirt and soot.


    Below are the instruction to remove and clean the burner assembly via a service manual I found online a few years back.

    To clean it you will need to:

    1. Turn off the gas supply
    2. Disconnect the gas union at the heater
    3. Remove the gas pipe installed into the gas valve.
    4. Remove the gas valve holding bracket.
    5. Remove the gas valve wires.
    6. Disconnect the ignition wire.
    7. Slide the burner tray out.
    8. You can remove the gas valve if you need to check the inlet and outlet screens (you will have to remove the pilot tubing).
    9. Remove the bracket that holds the burners in place.
    10. Remove each burner and check for any blockages.
    11. Remove the main burner orifices and check for blockage.
    12. Remove the pilot orifice and clean it (Do not use any sharp objects. It will destroy the designed orifice size!)

    I also will normally take the top cover off and vacuum the heat exchanger to remove any soot from there.

    If your heater is as old as you say it is possible it has gone a long time since it was last cleaned.
    Thanks! It is as old as Im saying it is Unfortunately!
    There really arent any lights on the front. Theres a knob for cold and hot and a switch for on, off, and spa.
    I had to hook up a digital fridge thermometer to it in order to control temps precisely for the spa. I would love to upgrade it to a new 400k one if they werent so darn expensive
    18x38 Inground Liner (25k gal) Paver surround, multi-speed pump, DE Filter, Raised spill over spa, TF-100

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    Re: Heater question

    Quick update:

    Those parts were not what was bad. Plus they are no longer available since the heater is from '96
    So AHS is replacing the heater completely. Delivered tomorrow. I cant say enough good things about them.
    A dual speed pump and natural gas heater a week apart. Incredible.
    18x38 Inground Liner (25k gal) Paver surround, multi-speed pump, DE Filter, Raised spill over spa, TF-100

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    Re: Heater question

    Quote Originally Posted by mitch08 View Post
    Quick update:

    Those parts were not what was bad. Plus they are no longer available since the heater is from '96
    So AHS is replacing the heater completely. Delivered tomorrow. I cant say enough good things about them.
    A dual speed pump and natural gas heater a week apart. Incredible.
    WOW count your lucky stars. Usually AHS isn't so nice. They usually find a way to deny a replacement.

    Lucky for me that I still have some of the parts for this old unit. It amazes people when I pull them out of my van.
    Paul
    http://www.gastekservices.com A word of caution: When working with gas and electrical you might want to consider a licensed contractor. Consider the value of your life and others around you. If you would like to provide a review of the help I provided, please use the following link to leave a review. gastek - Google Search,

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    Re: Heater question

    Why would they replace a heater of it was more than 20 years old? Am I missing something?
    1200 Sq Ft 41,000 Gal. Gunite, JANDY SVRS VS pump, JANDY JXI 400,000 BTU, Polaris 280 w/ 3/4 BP, Rockwall and Grotto (w/6 jets and blower), 2 JANDY Lam Jets, 2 LED Bubblers, 5 Ledlights, AQUALINK P16 RS, 90% Quartz, SWF 185 GMP BP, SWF 125 BP, Levelor K1100 Autofill, AP Digital SWG, 2 skim and 5 returns, and mostly 3 inch piping

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    mitch08's Avatar
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    Re: Heater question

    Quote Originally Posted by ps0303 View Post
    WOW count your lucky stars. Usually AHS isn't so nice. They usually find a way to deny a replacement.

    Lucky for me that I still have some of the parts for this old unit. It amazes people when I pull them out of my van.
    I would've thought the same thing. But so far they have been fantastic for me. No problems.
    They try to repair first and if not possible or cost effective they replace. Maybe the pool company they are using by me is good at convincing them.

    - - - Updated - - -

    Quote Originally Posted by grottoguy View Post
    Why would they replace a heater of it was more than 20 years old? Am I missing something?
    Its one of those applicance insurance companies. I pay an extre $30/month to cover the pool equipment.
    My dual speed pump stopped working and they replaced it no questions asked. Now my heater stopped working. They wanted to change out some parts but since the heater is from '96 they determined it wasnt possible and approved the replacement. I was shocked! It arrives tomorrow.

    The only thing is, the old heater is so old that the electric needs to be upgraded and some gas plumbing needs to be done. They won't cover that. So I told them to just drop it off and my regular pool guy would take care of it. So it'll cost me a few hundred to install but I can't argue about that.
    18x38 Inground Liner (25k gal) Paver surround, multi-speed pump, DE Filter, Raised spill over spa, TF-100

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