How to Fix / Troubleshooting

Safety: Turn off power before opening the cabinet. Do not operate the heater with visible water inside.

Inspect gaskets and covers: Check the control panel cover, top panel, and side panels for missing or damaged gaskets. Replace as needed.
Look for water paths: Identify where water is entering (around vent, through top, from above). Correct roofing or vent flashing issues if necessary.
Dry components: Gently dry affected areas with a cloth and allow time for complete drying before restoring power.
Condensation management: Ensure venting is installed per Pentair guidelines to minimize condensation dripping back into the heater.

Heater shuts down when it rains or after heavy condensation, then works again when dry.

Possible Causes