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 heat light on the main unit never comes on, but the light for heater on the control panel does light. When I turn the heater to the on position, the pump does start. If I turn the heat dial way down, the elec draw decreases as if the heater went off. Turning it up puts a load on the elec as if the heater turned on
Pool & Spa - Teledyne Laars
Answers & Comments
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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.
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John