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

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My control panel/board on the LX400 is always getting fried. When I replace it with a new one, same thing happens - the blower turns on and runs continuously even if the heater isn't running. Any suggestions?

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Check that your heater isn't wired to the line side of the timer. It should be wired on the load side, NOT the line side. Problematic at best to have your heater powered all the time, at worst deadly to the heater should your various pressure/temp sensors fail and the heater fire up when the pump isn't on.

Posted on Mar 06, 2011

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I have a 2011 Buick lacrosse..battery went out bought a new.. Car still won't start and now I hear humming from under the hood. While not on.. What could be the problem


Don't know how much you know about automotive electronics , but your vehicle has at least 10 different computers ( control modules ) on board . When they lose power they tend to do strange thing's , Not starting for one an if they do start ,HVAC system control panel not working an other things . Some times you need to take the vehicle to the dealer an have it checked out . Battery Disconnect or Replacement Problems Read this !

Oct 20, 2015 | Buick Cars & Trucks

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Heater blower wont run


Did you replace the resistor with a new one? Even new ones can be bad. replace it again. Then replace the controller. Controllers are the least thing that goes bad. Resistor,blower, then controller.

Dec 30, 2014 | 1999 Acura TL

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Ac unit buzzes and fan motor does not run when system turned on.


Your blower motor sounds like it is fried. I hope you have done something by now, 15 Oct 2014. But the best thing to do if someone is reading this and you get this symptom is to turn off the blower. If it is still under warranty, the new blower motor should not cost you anything except the labor and service charge. Different manufactures sometimes charge a small warranty charge to handle paperwork and shipping. If this recently happens to you, the most common cause is a voltage spike, like lightning strike, and it has blown the capacitor. If you do not have a capacitor on your blower motor, for example an x13 or an ECM type motor, then you will need to replace the control module and typically costs about $200. If your local dealer does stock the control module then the cost of most of these motors are around $500. Your best bet is to call a reputable repairman and get them to change it out. There is high voltage capacitors inside and can give you a good jolt if you happen to come in contact with the circuitry before the capacitor discharges.
Hope this helps.

Jul 07, 2014 | American Standard 5000 Heat Pump Unit

2 Answers

I hooked the battery post up backwards an it caused all sorts of things to happen the one I need help with is when I go to turn on my heater/AC none of it works at all it don't blow or anything..


It's amazing the car even runs. Reverse polarity on a car battery will usually fry the ECU, which is the computer that runs everything from the engine timing to smog control. Consider yourself lucky.
You must have had the Blower motor in the On position and tried to start the car after the battery hookup.
First start at the fuse for the Blower motor, which may be under the drivers side dash or in the engine compartment. (you did not specify the vehicle make)
If the fuse is OK, then the relay may be fried. relays are usually under the hood inside the big fuse/relay box. Look at the fuse/relay legend (map) inside the cover and locate the relay for the Blower motor. It may just have a 'fan blade' symbol. Exchange it for a relay of the same type and style in the same box. Put the 'new' relay in the blower motor socket. Turn the key to the 'On' position (just before 'Start') and test the blower motor. Turn the key off. If it worked, take the bad relay to a car parts store and buy a new one. It'll cost between $10 and $50. I know, doesn't seem worth it.
If that doesn't fix it, return the relays to their original position and go to the parts store and buy a repair manual for your year, make and model. Locate the section on Heat/AC and replace the Blower Motor Resistor. That's probably the culprit. Short of that, take it to the dealer or a good repair shop, that you trust. It can be an involved repair job.

Jul 05, 2014 | Cars & Trucks

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Laars lx400 blower does not come on


check filters or pressure switch sounds like safety switch isnt working

Mar 31, 2014 | Pool & Spa

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Glrs237zdw temp goes from 29 to 60


I am not sure if you said you checked the=> 5303918476 Defrost Control Board or here=> 5303918476 If you replaced the defrost thermostat inside the freezer that is most likely not the problem. These defrost control boards will really cause strange things to happen. Sometimes by unplugging and taking out the control board you will see burn marks or signs of heat damage on the printed circuit, not always. Unplug and open the control panel inside the fresh food compartment=> GLRS237ZW2 Control Panel

You will see part/location number 23 is your 5303918476 Defrost Control Board If I misunderstand please let me know so I can help you resolve this problem. Thanks Sea Breeze


Feb 12, 2012 | Frigidaire Freezers

1 Answer

My LX400 Laars hearter has started to vibrate loudly when running. I suspect its the blower assembly. How does the top rempve from the heater so I can get to the blower and check it? I see no screws or...


Not the blower! It's the Thermal Bypass located where the inlet and outlet pipe enter the heater. There is a thermal sensitive spring assister valve in there. It needs to be replaced. Probably due to bad water chemistry!

Mar 27, 2011 | Jandy Laars Lx 400,000 Btu Heater

1 Answer

My 2004 honda accord recently began having problems running the air conditioning. I turned my car on the other morning and the A/C does not blow air. However, control lights indicate the air should be...


Had a similar problem on my Accord. I did some research and found out that the blower resister/transistor/controller (it's called a few different things depending on where you look) was fried.

It is located under dash on the passenger side behind the lower panel. It's attached to the firewall with two screws. You can't miss it.

The part is about $85 and I was going to do it myself, but I couldn't get my hands in there to undo the faulty unit. The part number you are looking for is: 79330-SDA-AO1.

Oct 13, 2010 | 2004 Honda Accord

1 Answer

Blower motor will not come on. i have a rheem furnance


Turn your fan from auto to on at thermostat, if fan doesnt come on.
Remove blower motor door to get to control panel-Turn poweroff !
Try to turn blower wheel to see if it will turn freely,

Remove thermostat wires from control board, put a jumper wire between
r and g.Put door back on and restore power, fan should run. If it does
than it is possible you have a burnt out speed on whatever cylcle heat/cool you are trying to use.

To troubleshoot this-turn power off and find where the blower wires go to
control board. exchange the wires from park to heat or cool terminals.
put cover back on and restore power.IT should work,if nothing happens then you probably have a problem with blower

Feb 13, 2010 | Heating & Cooling

1 Answer

All electric displays do not work; oven does not work


With the symptoms you've described, it sounds like the main control board has failed and needs to be replaced in order to get the oven working again.

The control board is mounted in the backsplash behind the display panel. With the failure of this main board, it could have been caused by a recent electrical outage that may have caused a voltage spike that "fried" the control panel. It is a fairly easy repair, just be sure to turn off the breaker to the oven before you take the backsplash apart to get to the control board.

You can get a replacement control unit for the range, if you feel the overall condition of the stove is worth repairing. I always tell people that once costs to repair exceed 60% of buying new, you're better off buying a new appliance, IF the appliance is 10+ years or older.

You can go to the www.searspartsdirect.com to check for your particular part and get a good idea of the cost to buy the part (others available on the web too), but you'll need to have the complete model number to search for the specific part for your stove. (you're missing a couple of letters and/or numbers)

Hope that helps you decide how you should proceed - repair or buy new. Best regards!

Jul 30, 2009 | Hotpoint RB787 Electric Kitchen Range

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