Question about Jandy LAARS LX250 - PROPANE, DIGITAL READ-OUT, LOW NOX
I've had the unit for about 5 years and have had problems in previous years. In this case the igniter seems to be working fine, the blower works however, there is absolutely no smell of any gas. The "AGS" fault code comes on. I have tried it numerous times over the course of two days with the same results.
Make sure safety circuit is ok that cuts off fan and check pressure switch and hi limits
Posted on Jan 30, 2016
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Posted on Jan 02, 2017
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
This error is Automatic Gas Shutdown. Here is what you can do:
Since the burners do fire briefly, I would suspect the flame sense rod first. Attached is a link to the owners manual in PDF.
Lo Nox heaters can be a little tough so follow the directions exactly.
Posted on Jul 25, 2010
Check your baskets for plugs or your filter may be dirty. The impeller may be clogged in your pump if your pump basket is set wrong or if it has any cracks in it. These will all drop the pressure to the heater.
Posted on Aug 15, 2011
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(automatic gas shut-down)
1. Oscillating pump pressure.
1. Clean filter or identify and repair cause of
2. Low gas supply pressure.
2. Identify and repair incorrect supply pipe size
or pipe line blockage.
Refer to qualified service
3. No flame at burners.
3. No flame at burners. 3. Identify and correct
loose wiring connections, or problems with igniter, flame sensor, gas valve,
or ignition control.
Refer to qualified service
info the manual is here:
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