Question about Pentair Mastertemp Pool & Spa Heater Dual Electronic Ignition 400,000 Btu Lonox Propane 460737

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Heater starts, runs 30 seconds, heater shuts off, gives error code 05. Water flow is good

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Go topentair website you can get a repair manual in pdf format it will include a flowchart make sure you have the model and saerial if you cant figure it out you can call someone in tech suppoprt and they will walk you through it

Posted on Feb 01, 2010

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I am getting an error code ags


AGS - Auto Gas Shutoff = Because of a problem sensed, the gas valve is closing, stopping gas supply and hence heater shutoff.
Improper water flow through heater! Check filter, pump, water supply lines, anything that will reduce water flow into heater.
A faulty Pressure Switch may cause this problem as well.
or...
In coming water to heater is over 104°
If all is good with the above, replace the AGS Switch.

May 31, 2015 | Jandy Laars LX Pool Heater / 400,000 BTU /...

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H:ow can I get my pool heater to stay on?


Is your heater giving you an error code? When it shuts down, which light is on, "service system" or "service heater"?

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Rheem RTG-66DVN shuts off 1-2 times a day


You received recommended answer posted ago.
Probably same answer today:
Don't install tankless, especially in location where there is no service technician available unless you expect to heat water by setting tankless out in sun.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Repair any brand tankless, any error code or problem, same day, yourself for $385:
http://waterheatertimer.org/How-to-install-gas-water-heater.html

Add comment and give link to service manual that you located.

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1 Answer

When the burners ignite, within one minute it starts making a loud banging noise and then the HS code comes on and it shuts down. the noise continues for about 15 to 30 seconds after the burners shut...


This sounds like a low water flow situation. The heater is telling you that the high limit sensor is curring heater operation. The noises are the heat exchangers boiling the water either due to a blockage in the exchanger , a bad mixing vlve, or most likely poor water flow. This is tough to troubleshoot through a posting like this, but 1st thing is 1st. Check your water flow and make sure it is minimum 50 Gallons per minute.

Jul 18, 2011 | Hayward H-series Electronic Gas Pool...

1 Answer

My pool heater keeps showing e-05 and the heater will shut off in about 2 minutes. How can I resolve this problem myself?


The E-05 code sets when the exhaust gas temperature goes too high. This is often caused by a insufficient water flow. Ensure that you have good water flow before turning the heater on. Ensure that all valves are set to allow that to happen.

Dec 04, 2010 | Pentair Minimax NT Heater

1 Answer

So how do I fix this problem "sta rite 400na gives error code 05 after about 30 seconds?"


if it starts check your stack sensor its the one the exaust ----- And if it dont start change your ignition plug

Jun 19, 2010 | Sta Rite Sta-Rite Max-E-Therm High...

1 Answer

Noritz tankless water heater gives error code 11


This worked for me in the same situation. There is a filter inserted into main gas/ water control valve that senses water flow restriction. The sensor is connected to the gas valve. If it senses inadequate water flow it tells the gas valve to shut down so the water in the heater won't boil. Very expensive part. If you do find the filter clogged, a sediment water filter shoud be install on the inlet side of the water piping.

Oct 12, 2009 | Water Heaters

1 Answer

Sta rite 400na gives error code 05 after about 30 seconds


I am not sure if you have received an answer to the issue, or not, but just in case! An EO5 error code is an open stack flue sensor, or switch, There are two forms of the stack flue sensor, so you will need to know which one you have on the heater.

What this error code means is that the sensor "read" the flue temp to be over 500 degrees. Usually, it is just gone bad and reading the wrong temp.

Jun 14, 2009 | Sta Rite Sta-Rite Max-E-Therm High...

2 Answers

"LO" error code on new H400FDN heater


it is low water pressure sensed, unit will not start unless pump is working

Jun 07, 2009 | Hayward 250kbtu Ng Pool Heater - Inground

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