Avenli
Heater Element Failure Without Code
Spa does not heat water at all, but filtration and bubbles operate normally; no error code displayed.
Advertisements
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.
Advertisements
Possible Causes
Partially open heater element, Weak heater relay contacts, Loose heater wiring, Internal thermal fuse open but not detected
How to Fix / Troubleshooting
Safety first: Unplug the spa and ensure the control box is dry before opening.
- Confirm symptoms:
- Run the spa for 30–60 minutes with heat enabled and verify that the temperature does not increase.
- Inspect heater wiring:
- Check the heater tube assembly connections for looseness or discoloration.
- Tighten any loose terminals.
- Check for relay clicking:
- With the cover off (and extreme caution), listen for a click from the control box when heat is commanded ON.
- No click may indicate a failed heater relay on the PCB.
- Replace heater assembly: If wiring is sound but no heating occurs, replace the complete Avenli heater tube assembly. If a new heater does not resolve the issue, the control box PCB must be replaced.
Advertisements
Repair Difficulty
Hard
4/5
Required Part
Heater Tube Assembly
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements