Question about Jandy Laars LX Pool Heater / 400,000 BTU / Natural Gas

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My Jandy LAARS LT400N-L Pool Heater errors "Service" and "AGS"

My Jandy LAARS LT400N-L Pool Heater is not working properly. I am getting the error "Service" and "AGS". If I press the gray button in between "pool" and "spa" it will force it to cycle through and then start but the heater will not start automatically. It doesn't do this every day but does this frequently enough that it is keeping the pool from heating. The filters/pump have been recently serviced.

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Check pressure switch and copper tube

Posted on Jan 30, 2016

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Posted on Jan 02, 2017

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SOURCE: what does service ags mean on a LAARS LX pool

AGS stands for Automatic Gas Shutoff. This means the heater failed to sense a flame or flame rectification. When this occurs, the the gas valve will close as a safety precaution. The heater will have to be reset to get another call for heat.

Posted on May 19, 2010

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AT THE HEATER PRESS THE BOTTOM TO TURN THE HEATER ON LINE IF NOTHING HAPPEND THE HEATER MUST DE WIRE CHECK YOU MANUAL FOR THIS ONE

Posted on Oct 15, 2009

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SOURCE: Pool heater will light then turns off

check gas pressure you should be getting about 10" water coloum

Posted on Feb 04, 2010

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SOURCE: I have a Jandy Laars LX Pool/Spa Heater...when I

If the unit is lighting then shutting off then repeating it isn't rectifying, means not sensing the flame. May have a bad flame sensor or ignition control. I'm guessing your AGS is indicated on the GUI also.

Posted on Mar 07, 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 /...

1 Answer

Pressure switch light going off and heater won't start


back wash filter. clean out pump basket, ensure you have proper water flow. Once you have ensure proper water flow and problem still exists, you will most likely have to replace the pressure switch

Mar 17, 2014 | Jandy Laars LX Pool Heater / 400,000 BTU /...

1 Answer

Laars pool heater wont start.


check safety circuit starting with pressure switch if voltage on both sides ok if not check pressure switch if ok check copper tubing it gets clogged at header

Mar 27, 2013 | Jandy Laars Lt 400,000 Btu Heater

1 Answer

Laars LX 250 AGS Service error. Burners ignite the go out.


if connected 120 volt switch red and black wires its not rectification

Nov 17, 2012 | Jandy Laars Lt 250,000 Btu Heater

1 Answer

What does service ags mean on a LAARS LX pool heater?


AGS stands for Automatic Gas Shutoff. This means the heater failed to sense a flame or flame rectification. When this occurs, the the gas valve will close as a safety precaution. The heater will have to be reset to get another call for heat.

May 18, 2010 | Jandy 131K BTU LAARS AIR ENERGY HEAT PUMP...

1 Answer

Service light and ags light comes on after a minute or two


I had this problem. Jandy ended up replacing the burner from day 1 with the heater (LT400 propane). It was a manufacturing defect. Of course it took 5 trips from the "warranty" company to not fix it before they finally punted to Jandy. Then, there's only one Jandy service rep from VA to ME (I'm in PA).

Jan 27, 2010 | Jandy Laars Lt 400,000 Btu Heater

1 Answer

Jandy lx250 heater is giving me service code ags


AGS automatic gas shut down
which means you have ignition failure, which can be from low gas pressure, or volume. if the heater fires then goes out the signal is not going back to the control module check all wiring.

Jun 16, 2009 | Jandy LAARS LX250 - NATURAL GAS, DIGITAL...

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