Caldera Spas
Insufficient Heating Capacity / Heat Loss
Spa heats very slowly or cannot reach set temperature in cold weather.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Aging or partially scaled heater element, Poor insulation or damaged Caldera cover, Circulation pump not running continuously, Ambient temperature extremely low
How to Fix / Troubleshooting
Safety first: Turn off power before inspecting internal components.
- Check cover condition: Inspect the Caldera spa cover for waterlogging, tears, or gaps. Replace if heavy or damaged.
- Verify circulation: Ensure the E5 circulation pump runs during heating cycles and that flow is strong.
- Insulate equipment bay: Ensure equipment compartment door is properly sealed and any factory-installed insulation is intact.
- Heater inspection: If the heater is old or shows scale buildup, consider replacing it to restore full heating efficiency.
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Repair Difficulty
Medium
3/5
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