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

1 Answer

"AGS" problem. Has a new ignitor. Water flows freely.

I have a "Service" light and the "AGS" light is also lit. The skimmer/pump baskets and the filter are all clean. The pump flows freely and uniformly. I have replaced the Hot Surface Ignitor, although the ignitor's probe did not come with the kit so it is still the original. This heater was installed in 2002 and has had no repair issues until now.

Posted by on

  • aquablue1 Apr 27, 2010

    Thanks for the reply. The gas pressure is sufficient, and I have checked all other switches. I'll try cleaning the probe and see if this helps. Any other suggestions I could take with me to the job site?



  • aquablue1 Apr 27, 2010

    I'll know when I get there!



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Master
  • 11,896 Answers

The probe should be thuroughly cleaned. That may be the problem. They have to be clean in order to maintain a certain temperature. If dirty, temps fall and pilot won't stay lit. Also check your gas valve to make sure spring is not weak and you get a good flow of gas. If you have done these steps and it is still happening, then you may want to consider doing some testing of any relays and power to the system

Posted on Apr 27, 2010

  • Nate Stansfield
    Nate Stansfield Apr 27, 2010

    Also take a look at the AGS (auto-gas shutdown) system

    The AGS and service light can come on for these reasons:

    No Flame at burners

    Low gas pressure

    Low Oscillating Pump Pressure

    Check these things:

    Filter is clean, Pipe line blockage, flame sensor, and ignition problem. (dirty probe)

    This system has 6 switch/components
    Pressure switch
    Hi-Limit Switch
    Air Flow Switch
    Temp Sensor
    and 2 extra switches

  • Nate Stansfield
    Nate Stansfield Apr 27, 2010

    The owners manual has some good diagrams if you need them.

    You can copy and paste this link in your internet address bar under a new tab



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

No flow light is on. Have cleaned cell, back washed filter , cleaned out basket attached to pump and basket in skimmer box. Flow light is still on.

If you are referring to a salt system and your filter is clean. You will need to replace your flow sensor.

Dec 19, 2016 | Pool & Spa

1 Answer

How do i prime this swimming pool pump?

The normal procedure would be to unscrew the top of the inlet basket and fill that with water until it flow out down the inlet pipe, then replace the top cover. Make sure the skimmer box basket is clean, the pool water level is high, or put a fast running hose in the skimmer box to make sure the primed pump does not have to pull the water up from too low at the inlet.

If it will not pull the pool water in when started, then -
- there is a leak or blockage somewhere on the inlet side
- the pump impeller is damaged
- the filter is clogged too much and causing back pressure
- the pump power and pipe sizing are mismatched

Oct 08, 2014 | Pool & Spa

1 Answer

Lo flo pool power rp23

Clean your filter,...
... just a slight sensing of "Lower" water flow, may trigger the sensor to read not enough water flow. Also check your impeller, your skimmer baskets & the hair and lint pot basket at the pump.
If all those are confirmed as clean & clear - then you may have a faulty flow sensor.

Apr 24, 2014 | Pool & Spa

1 Answer

Pool pump surges water no steady flow

Check your water level, skimmers and weir gates, and the o-ring on the pump lid where the basket is. Air is getting in somewhere between the pool and the pump basket.

Mar 14, 2014 | Pool & Spa

1 Answer

Pool cleaner starts and then stops working

Check for water flow / water flow restrictions / and water flow blockages.

Many things create water flow reductions: Dirty filters, plugged impellers, packed with debris baskets - both skimmers and at pump, closed to partially closed valves, air suction leaks: worn shaft seal, worn orings at pump lid or pump volute body, low water level, stuck skimmer weir blade/gate in the up position & skimmer empties and air is sucked into the system which may cause the pump to lose prime. This a problem that goes un-noticed and is hard to detect even by some service technicians!

Jan 31, 2014 | Pool & Spa

1 Answer

No water flowing through pump

check top seal if ok check intake union see if loose or see if debris in impeller

Jun 16, 2012 | Pentair 15 Hp Superflo Swimming Pool Pump

1 Answer

I returned from vacation and the water level was adequate b/c it had just rained a lot. I think the water may have gotten low when we were gone. Now there is not enough pressure in the pump and the...

Any air getting into the suction line of the system can cause a low flow. If too much trans is in the skimmer basket or pump basket you cna get a low flow. If junk is in the pump impeller or the filter the flow can be low. Check each of these possible problem and you will likely resolve it. I hope this helps.

Aug 12, 2011 | Jacuzzi MAGNUM FORCE POOL PUMP 2 HP...

1 Answer

I hooked up a new Polaris 280 pool cleaner to replace my Arneson Navigator and it doesn't move.

I would first take it out of the water and check for proper wheel RPM. If it is less than 28 RPM or you are getting no movement at all, it is going to be a problem with the power source. It is likely going to be that your booster pump is missing, malfunctioning, or is not installed properly on the pool cleaner. There are a few other things to check. Clean the skimmer, filter and pump basket, clearing any debris that restricts water flow. Check the hoses, connections and swivels for leaks. Try removing the blue restrictor disk from the UWF or if an adjustable gate valve is installed on the booster pump or cleaner line, open it completely so water can flow freely.

Jul 20, 2011 | Polaris VacSweep 280 Pool Cleaner with...

2 Answers

My zodiac pool filter is showing up with the light no flow on

Usually means the electronics in the pump has detected there is no flow through the pump. Check all inlets, clear skimmer baskets, and ensure the primer box (witht he removable see through lid near the pump itself) has water in it before starting the pump. If there is no output back into the pool, there is no actual water flow, and hence the filter will show the "no flow" light. If there is good flow through the system and the light is staying on, then probably just a problem with the light or flow sensing circuit.

Mar 19, 2011 | Pool & Spa

1 Answer

All DE is NOT getting sucked into the skimmer...why? Some went in and the rest is flowing out of the skimmer into the pool

You should always mix DE with water and make a slurry mixture. When you put dry de in the skimmer it will collect in the pump basket and slow or stop the flow of water being sucked through the pump. When that happens the de will just flow away from the throat of the skimmer just like you describe.

Apr 05, 2010 | Hayward Pool & Spa

Not finding what you are looking for?
Jandy Laars LX Pool Heater / 400,000 BTU / Natural Gas Logo

Related Topics:

224 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jandy Pool & Spa Experts

David Spradling
David Spradling

Level 3 Expert

5056 Answers

Pj Kiley
Pj Kiley

Level 1 Expert

21 Answers

Bill Jordan

Level 2 Expert

372 Answers

Are you a Jandy Pool and Spa Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides