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Heater for Dimension One spa causing circuit breaker to open

I checked the resistance on each leg to the pump to ground to be about 1k ohms

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Resistance on heating elements should be 10.8 or more. if it isn't that high you need a new element.

Posted on Feb 26, 2009

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I have a handy lite2 LJ175N and I keep getting FL4 error code but the hot surface ignitor works if I run power to it from an outlet.

Maybe an open circuit at igniter?
Direct power at igniter, does not make it problem free when installed on the heater.
So many variables...
burned fuse for igniter, bad wire connection, broken wire within sheathing,etc,
all of these will cause a resistance change in ohms. Temperature is read by Heater logics in ohms resistance - both set temperature and actual temperature. So if resistance is off, heater may not work. Could be cracked igniter, or shorting to ground. When you remove the heater from igniter operation, by bypassing and installing a direct alternate power source, you are removing all self test features and safety aspect of heater.
FL4 usually means bad igniter - replace it.

May 31, 2015 | Pool & Spa Heaters

1 Answer

How do you check if therostat is bad

There is a device called a thermistor mounted into the header that will change its resistance to electrical current depending on the temperature of the water. These usually have two gray wires that attach into the control panel. Unplug the wires and put an ohm meter on them. At 80 degrees should read about 93 ohms. At 70 degrees should be at 118 ohms.
If you get infinite ohms you have an open circuit, if you get 0 ohms you have a short. Either way replace the sensor.

Mar 16, 2013 | Raypak Pool & Spa Heaters

1 Answer

Can I change out a Hayward H400ID with an electric heater for the spa only? If so what electric heater product brand would you recommned. Raypak?

Hayward has manuals for each type heater, gas and electric.
Hayward also has contact page, and can probably recommend correct change-over product.

You want to switch from propane to heat-pump type.

There are likely 3 areas of difference. Read each manual and generally look for 1) unit size and capability to match spa 2) pipe connections and sizes 3) Electrical requirement

From electrical standpoint, You need GFCI-protected line from circuit breaker box, or GFCI (arc-fault) breaker. This will prevent electrocution risk around spa.

Wire sizes are based on volts and watt-rating of heater.
Each electrical device has rating plate showing volts and watts.
3500 watts divided by 240 volts = 14.5 amps so install double-pole 20 amp breaker and use 12 gauge wire.
1500 watts divided by 120 volts = 12.5 amps so install sinle-pole 20 amp breaker and 12 gauge wire.

Oct 28, 2012 | Raypak Spapak Electric Spa Heater -...

1 Answer

Pilot stays lit, pump runs, burner does not light, no gas pressure detected at burner. Waht could be the problem please

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First you will need to get a hold of a digital or analog multimeter and set it for the lowest range of Ohms you can. Your safety circuit is a string of several switches all strung together in a row with the gas valve at the end and the beginning of said string. Any one switch being open or a bad connection anywhere in the circuit and the heater will not fire.

You task is to remove one end of the circuit from the valves TH or TT post and put one end of you meter on that wire and the other end on the TH/PP terminal. It will likely read infinite resistance. Leave one meter lead where it is and remove the other. Follow the circuit from the connected lead up to the first switch. Check continuity from the lead left connected to both sides of the switch. If there is continuity to both sides the switch is fine. Keep moving from switch to switch until you find the bad switch or connection. There may be more than one. When the circuit is working properly and there is nothing within the heater to cause it to shut off you should have 5 ohms or less across the entire circuit. Once you get the reading to that level the heater will work as it should

If you are not familiar with the process I described you would be better served hiring a pool technician to perform this repair as you can cause significant damage to the heater if you do not repair it properly.

If this answer does not fix your problem, please comment with additional details prior to rating the answer. Positive feedback is appreciated once your problem is solved!


May 21, 2011 | Teledyne Laars Laars Lite 2 Pool Heater...

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Model # SWR12R5GDCOH 40amp - 240V - 3+g wiring - phase 1 - 6.0kw heater I was given this spa Friday (working). At my home and wired on Sunday and everything works except I'm getting no heat. The red...

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Use a digital or analog multimeter to test the heater. Start with voltage to the element probes inside the control box. They will protrude from the S.S. pipe into the control area. Confirm you have 230VAC line to line and then confirm 115VAC from each post to ground. Any variation of more than 10% from those numbers would suggest you have electrical issues.

If you have acceptable voltage to the element and it still will not heat turn all the power off and disconnect one of the line leads from the element post. Use the lowest ohm scale on the meter to measure resistance across the element. A typical reading is somewhere around 10 - 15 ohms...a very low resistance reading. Anything above 20 indicates problems with the element. What you will likely find is an element with infinite or some other reading WAY higher than even 20 ohms. Replacing an electric heater element in a spa heater is a fairly typical repair.

If this answer does not fix your problem, please comment with additional details prior to rating the answer. Positive feedback is appreciated once your problem is solved!


Nov 09, 2010 | Teledyne Laars Pool & Spa Heaters

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I have a 10 year old hot tub I just inherited. It is 110 and has a bowtie style heater coil attached right below the control/timer/thermostat box. I noticed after installing that If I was not wearing...

You want to check ohm's to ground and casing on the heater. The heat coil has a sheathed wire inside it creating the heat. You don't necessarily need a bad spot in the casing it can be internal and just be touching inside the case to cause the problem. So like I say you just need to keep checking the heater leads to casing till you find where the power is bleeding from.

Oct 21, 2010 | Pool & Spa Heaters

1 Answer

Unit comes on and runs for 5 minutes, the circuit trips off

30 is the correct size breaker for this unit. It sounds like there is a grounding issue going on in the system. Or off of the Thermostat. Something is grounding out causing the switch to trip. Are you running #10 wire to breaker and the unit? If not you will need to increase your wire size

Jan 03, 2010 | Dayton D-F79 Electric Space Heater- the...

1 Answer

Pool heat blows circuit breaker after a few min. of running

if its a gas heater,make sure circuit is overloaded i.e.other appliances on same circ.An electronic ignition pool htr uses a very small amt of electricity.check for proper grounding.

Jun 24, 2009 | Hayward Pool & Spa Heaters

1 Answer

Why does the breaker switch off as soon as i turn on the heat

Two possible reasons- the circuit that the pump is connected to (the plug it is on) has too much power draw from other appliances running on that same circuit. Or, there is a short in the pump, causing it to draw excessive power and trigger the breaker.

Is this a recent development? Is the pump on a shared circuit or does it have its own breaker?

Mar 30, 2009 | Dream Maker Spas Dream Maker Ez Spa Hot...

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