Question about Jandy TELEDYNE LAARS BLOWER PRESSURE SWITCH

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When I turn on the spa heater the pressure switch light flashes

As a result the heater is not working

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  • Jandy Master
  • 3,539 Answers

If filters ok check pressure switch

Posted on Apr 29, 2016

6 Suggested Answers

PartsCenter
  • 125 Answers

SOURCE: Spa water drains to pool

Here is a link to the Aqualink website so you can download a trouble shooting guide.

Posted on Feb 26, 2009

PartsCenter
  • 125 Answers

SOURCE: service light is on say's to reffer to manual

Trouble shooting guide and Owners Manual

Posted on Mar 04, 2009

  • 2 Answers

SOURCE: SPA Filter on while Spa is Heating

you have one jandy valve ( the suction valve in front of the pump) that is not working right when you press spa mode. have someone watch the valves to see if they move when you press spa mode and heat inside the house. if the one in front of the pump does not move and the switch is in operating mode then that valve is bad and will have to be replaced.

Posted on Aug 06, 2009

  • 246 Answers

SOURCE: my spa switch has a button that does not work

spa side switch need to be replace $175.00 free deliver

Posted on Sep 13, 2009

  • 990 Answers

SOURCE: I have an aqualink rs

If the Aqualink is calling for heat then the problem is most likley in the heater. Without more information I can't tell you much more but if nothing has changed in the last couple of days. Before you call anyone be sure to clean your filter and baskets. The heater need a set amount of pressure to run and if things are dirty it won't get that pressure. Good luck.

Posted on Mar 13, 2010

Testimonial: "The burner is lighting but won't stay on, more than a minute or so. I tend to think the problem is water flow, like you say. Thanks...DC"

  • 760 Answers

SOURCE: My Jandy Laars LX 400,000 BTU heater flashes "low pressure"

Once you try to ignite three times in succession, and the heater doesn't sense the presence of flame, the heater goes into "lockout" mode and must be reset to fire. This can be done by pressing and releasing the mode button so that the heater is turned off then returned to the desired mode. So if you were going to "jumper" the pressure switch, (connecting two wires together) make sure you do the reset also. Make sure you don't operate like this, if your pump quit, you could have a melt down. Also If you have anything connected to the fireman switch, it is in series with the pressure switch,and woud display the same thing. There is a terminal with two white wires, if there is a jumper there, then nothing conected, but if there is something connected, make sure it is closed. Also be sure your code was for Water pressure and not air pressure switch. You can download manuals at: www.jandy.com

Posted on Jul 27, 2010

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1 Answer

How do I adjust the pressure switch on my hayward h250 heater


The purpose of the pressure switch is to verify the pool pump is operating properly and water pressure is present in the heating chamber. When water pressure is not present, the heater control system is designed to not allow initiation of flame. The pressure switch is preset at the factory for deck level installations. When the heater is located below the level of the spa or pool, the pressure switch may require an adjustment to compensate for the no-flow static head.

CAUTION: The Hayward Pool Heater is essentially a furnace. A trained technician should be consulted to repair it. DO NOT OPERATE the Hayward Pool Heater without a properly functioning and calibrated water pressure switch. The pressure switch adjustment requires both the pool pump and the heater be operational. As a result, extreme caution should be used during this procedure since sources of energy can not be isolated during the procedure.

The following procedure is recommended to calibrate the pressure switch.

1. The water pressure switch is located behind the front service panel. The pressure switch is typically on the left side, above the burners.
2. Be sure the water filter is clean before making the adjustment.
3. With the pump and heater system switch on, carefully turn the pressure switch adjustment dial clockwise, until a click is heard from the gas valve.
4. Turn the adjustment dial counterclockwise 1/4 turn.
5. Turn the pump off and on several times. The heater should shut off immediately when the pump is shut off. If the heater fails to shut down when the pump is off, repeat the steps above until the pressure switch is properly adjusted.
6. If the adjustment process fails to produce proper results the pressure switch should be replaced.

Jun 22, 2014 | Hayward H Series Pool & Spa Heater...

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

Jandy LX Pool Heater Pressure Switch Light Flashing Red


set back to where it was take off copper line unplug it should work

Jan 13, 2013 | Jandy Laars LX Pool Heater / 400,000 BTU /...

2 Answers

Pressure switch fault on jandy xl POOL HEATER


check to see if pressure switch has voltage both sides also check copper tube to see if plugged

Nov 12, 2012 | Jandy Laars LX Pool Heater / 400,000 BTU /...

1 Answer

Pressure light switch flashing when unit turned on


Check if there is an adjustable pressure switch on the delivery plumbing somewhere. It will be connected to the computer by a sensor wire.

Nov 08, 2009 | Jandy Laars Lt 250,000 Btu Heater

1 Answer

Low pressure flashes when i try to turn on the heater


check strainer and skimmer for excess debris that will cause low flow to heater thus not engaging pressure switch.make sure filter is clean.if all of these check out ,take continuity reading on pressure switch.if no continuity,try to adjust pressure switch if it wont adjust ,its faulty.take extreme caution when adjusting make htr will shut down when pump goes off

Jun 23, 2009 | Jandy Lx Pool & Spa Heater - Electronic...

3 Answers

Hayward H400 heater problem


LO usually indicates low water pressure. Check the pressure in your filter. You may need to backwash. If the filter is to clogged then the water pressure in the heater is so low that it won't activate the pressure switch. While checking the pressure turn the pump off and then on to make sure the pressure gauge is actually working. Also check the pressure coming out of the inlets into the pool. You should be able to tell if you have sufficient water pressure.

Jan 24, 2009 | Hayward H Series Pool & Spa Heater 400k...

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