Question about Lite On Laars Lite 2 Heaters: 250,000BTU MV Heater

1 Answer

Heater kicks on, but kicks right off

Hey, my pool heater turns on, that is the pilot light will come on, it will click, the flames will turn on and then go right out. What could cause this and how would I fix it?

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  • ricke48 Dec 13, 2007

    My laars lite 2 will come on and work fine in dry conditions(I did put a roof over it)but after a rain or very humid day it will cycle on and fire up for about 4 seconds then turn off. The filter is clean and pressure low,someone told me it could be moisture getting the circuit board.Any ideas will be appreciated

  • Anonymous Jun 01, 2008

    just had pool opened. pool people removed burners over winter. now heater cycles on and then off after 20 seconds. can I remove burner assemply to check thermocouple? and what does thermocouple look like?

  • Anonymous Aug 10, 2008

    I just purchased the lite2 lj propane version. it ignites and stays on for about 7 secs then shuts off. I have checked the flame sensor and it appears to be in the flame. what could be the problem?

  • robert929 May 02, 2009

    My Laars Lite 2 won't stay lit. The gas flame come on for about 5 seconds but then goes out. I bypassed the preeuse switch but it continues to happen.


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  • 105 Answers

There is a small probe that is heated by the pilot flame. This is called a thermocouple & keeps the gas valve open by generating a small electric current. Most likely the pilot flame is too small, or not heating the thermocouple properly. Either turn the pilot up a bit, or gently bent the thermocouple bracket to put it in the flame a bit more. Do not try to bend the thermocouple itself. If this does not help, a new thermocouple may be needed.

Posted on Jul 15, 2007

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1 Answer

HOW CAN YOU TELL IF THE PILOT LIGHT IT LIT?


The Hayward H Series Pool Heater with standing pilot uses a standing flame to safety initiate combustion, and the standing pilot flame is uses to generate about 0.400 to 0.450 volts DC to operate the gas valve.

CAUTION: Your Hayward H Series Pool Heater is essentially a furnace. Only qualified technicians with proper training and tools should repair your heater.

Once you have completed the pilot start procedure in your heater manual, the pilot flame should be visible but it is difficult to see. The pilot is located at the bottom of the heater, to the left side of the burner chamber, about half way between the front and back of the heater. Before attempting to verify the pilot, it's wise to turn the thermostat to the full counterclockwise OFF position. There are two useful methods to verify the pilot: 1) Before you initiate the pilot procedure, place a small mirror on the floor of the heater on the left side of the burner chamber, just inside the combustion area. CAUTION: DO NOT attempt to place or remove this mirror while the heater is in combustion mode! After placing the mirror, you should be able to see the pilot assembly. Follow your pilot start procedure, then you should be able to see the pilot flame in the mirror before you turn the gas valve knob into the ON mode. Be careful to remove the mirror before initiating combustion. 2) Only when the pilot flame is on will the thermocouple generate the circuit voltage required to operate the gas valve. During the pilot start procedure, while the gas valve knob is still in the "pilot" position and the pilot flame is on, the circuit voltage can be measured at the gas valve without danger of initiating combustion. Using a volt meter, measure the voltage between the RED and WHT wires on the gas valve terminals. This measurement should be between 0.400 and 0.450 volts DC. If below, the gas valve will not operate even if the pilot is ON.

After verifying the pilot, be sure to remove the mirror (if used) and the voltmeter (if used), turn the gas valve to "ON", and return the front heater cover before initiating combustion.

May 24, 2014 | Hayward 250kbtu Ng Pool Heater - Inground

1 Answer

Need to light pilot light


You need to turn the knob on the gas valve (inside the heater) to the "pilot" position. Then, while holding a flame over the pilot assembly push down on the knob.

Gas should come out of the pilot and ignite. Continue holding the knob down for 10-15 seconds. Release the knob and the pilot should stay lit. If not the pilot generator may need to be replaced.

Turn the knob to the "on" position, close the heater and turn the heater on and turn the thermostat to hot. The heater should fire. If it does not fire and the pilot goes out, that may also indicate a pilot generator problem.

Nov 20, 2013 | Teledyne Laars Pool & Spa

2 Answers

How to I start my heater


If it is this heater, then you must:

1- turn the toggle switch to the ON position.
2- Turn the gas valve dial to the PILOT position.
3- Depress the pilot button while pressing the ignitor until you see a flame. Continue to depress the pilot dial for about 30-60 seconds.
4- let go of the button, and the pilot flame should stay lit. If it does , then turn the gas valve dial to the ON position.
5- Set the temperature and your done.

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1 Answer

My pool heaters starts to hum and the service light comes on


millivolt heaters generate their own power from the flame on the pilot max is usualy 750 millivolt, check all connections clean and secure.
Mmake sure the pilot is lit

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1 Answer

Have pilot light lit but unit willnot come on hayward h350 heater


check millivolt output,if it is in normal range(400-600)check for continuity on pressure switch,flame rollout and high limits.

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1 Answer

Heater won't stay lit


On your main gas manifold you have orfaces that screw into it at each burner. Remove these and see if their are small spider webs in them. They will look like little lint balls. They can keep your main burner from getting gas and in turn keep the heater from sensing flame. The pilot lights and the heater starts but no flame at the main will shut it rite down. See if this helps.

May 05, 2009 | Hayward H Series Millivolt 250,000 Btu...

1 Answer

Piolit light on a raypark gemini spa heater


take off front door instructions are posted on it.if not, turn gas valve to pilot,depress,place flame in front of pilot tube,should **** flame in and ignite pilot,when it lights,continue to hold knob down for 30secs.,release ,if pilot stays on,turn to "on" position. you're" ready to go!!

Apr 08, 2009 | Pool & Spa

1 Answer

Lighting the pool heater


You will need to buy a new thermo couple 8.00 part from ace it is the little copper line close to piolet flame,it sences the piolet and allows the gas to open and feed,it is wore out,burned out,replace.

Mar 30, 2009 | Teledyne Laars Laars Lite 2 Pool Heater...

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