Question about Pool & Spa Heaters
I checked the resistance on each leg to the pump to ground to be about 1k ohms
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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you for posting your question here on Fixya.com.
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.
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May 21, 2011 | Teledyne Laars Laars Lite 2 Pool Heater...
Thank you for posting your question here on Fixya.com.
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!
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