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How to fix Raypack that Runs for 2 minutes and then off with PLT on Screen

If your Raypack (mine is a 2100 but most have the same electronic ignition pilot) lights and runs for about 2-5 minutes an then shuts off, you need to clean the pilot sensor. The pilot sensor tells the unit the Burners are running. If the pilot sensor becomes corroded, carbon, etc. the unit will light but will shut off after a few minutes as it thinks the unit is not operating properly. The unit will try to re light, but fail, and then PLT will show on the main programming screen. To fix the probelm, shut off the unit power. Remove the pilot assembly which is located at the bottom right of the unit. There is one screw holding the pilot assembly in place. Gently remove the pilot assembly. There is a fork like probe sensor (not the one with ignition and gas feed) that needs to be cleaned. Take some rough sand paper and clean it thoroughly. Re insert pilot assembly and fire the unit. If this fails, clean the sensor again. Problem solved!

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raypack 2100 pool heater runs for a couple of minutes then loud banging noise. heater shuts off and error code HL appears


That HL is your high limit shutting the heater down. The banging is the sound of water boiling in the heat exchanger because it is moving too slow. This is almost always the result of the bypass or governor (thermostat) not working properly, so too much water is bypassing the heater. It's not too hard of a fix.

Dec 17, 2013 | Raypak RP2100 DIGITAL POOL HEATER R265

1 Answer

how to replace a pilot


Probably no need to replace pilot. Just clean it. If your Raypack (mine is a 2100 but most have the same electronic ignition pilot) lights and runs for about 2-5 minutes an then shuts off, you need to clean the pilot sensor. The pilot sensor tells the unit the Burners are running. If the pilot sensor becomes corroded, carbon, etc. the unit will light but will shut off after a few minutes as it thinks the unit is not operating properly. The unit will try to re light, but fail, and then PLT will show on the main programming screen. To fix the probelm, shut off the unit power. Remove the pilot assembly which is located at the bottom right of the unit. There is one screw holding the pilot assembly in place. Gently remove the pilot assembly. There is a fork like probe sensor (not the one with ignition and gas feed) that needs to be cleaned. Take some rough sand paper and clean it thoroughly. Re insert pilot assembly and fire the unit. If this fails, clean the sensor again. Problem solved!

Sep 21, 2010 | Raypak Rp2100 Pool & Spa Heater Lonox 407k...

2 Answers

I have a raypak 2100, looks like its a 1997 model (seriel# starts with a 97). Unit starts up fine, runs for about 5 minutes and shuts off. It's not close to reaching temp, and I get get it start back up at all. The next day, after I've turned the pump off for the night, I can get it to start back up, and again it shuts off after 5 minutes. On occasion during this process the "call for heat" light seems to flicker before shuting off. Any thoughts? I'm in Wisconsin and we're ready to close up the pool, but want to figure out the problem before we close.


If your Raypack (mine is a 2100 but most have the same electronic ignition pilot) lights and runs for about 2-5 minutes an then shuts off, you need to clean the pilot sensor. The pilot sensor tells the unit the Burners are running. If the pilot sensor becomes corroded, carbon, etc. the unit will light but will shut off after a few minutes as it thinks the unit is not operating properly. The unit will try to re light, but fail, and then PLT will show on the main programming screen. To fix the probelm, shut off the unit power. Remove the pilot assembly which is located at the bottom right of the unit. There is one screw holding the pilot assembly in place. Gently remove the pilot assembly. There is a fork like probe sensor (not the one with ignition and gas feed) that needs to be cleaned. Take some rough sand paper and clean it thoroughly. Re insert pilot assembly and fire the unit. If this fails, clean the sensor again. Problem solved!

Sep 19, 2010 | Raypak Free Hydraulic Lift Gate Delivery -...

1 Answer

Have a Raypak RP2100. When I turn it on the pilot lights fine but after a few minutes (~30 minutes) the heater turns off and PLT is indicated on the control panel. If I recycle the power it lights fine and repeats after about 30 minutes. It is about 10 degrees below the set point. I had some work done in the house (had to shut gas off at main and replace a line) about two weeks ago. I am wondering if there might be air in that line and it needs bleeding?


If your Raypack (mine is a 2100 but most have the same electronic ignition pilot) lights and runs for about 2-5 minutes an then shuts off, you need to clean the pilot sensor. The pilot sensor tells the unit the Burners are running. If the pilot sensor becomes corroded, carbon, etc. the unit will light but will shut off after a few minutes as it thinks the unit is not operating properly. The unit will try to re light, but fail, and then PLT will show on the main programming screen. To fix the probelm, shut off the unit power. Remove the pilot assembly which is located at the bottom right of the unit. There is one screw holding the pilot assembly in place. Gently remove the pilot assembly. There is a fork like probe sensor (not the one with ignition and gas feed) that needs to be cleaned. Take some rough sand paper and clean it thoroughly. Re insert pilot assembly and fire the unit. If this fails, clean the sensor again. Problem solved!

Aug 01, 2010 | Raypak Rp2100 Pool & Spa Heater Lonox 407k...

1 Answer

Coleman Evcon model DGATO70BDC Starts to run then stops?


What you have is an ignition problem and your unit is shutting down on safety.

May 01, 2008 | Heating & Cooling

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