Stelpro Energy Monitoring / Metering Error

Thermostat shows energy usage or consumption data that seems clearly wrong

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Possible Causes

Incorrect heater wattage configured in thermostat, Shared circuit with other loads, Firmware bug in energy calculation, Faulty current sensing circuit on Stelpro board

How to Fix / Troubleshooting

Safety: No electrical work is required unless verifying wiring or adding dedicated circuits.

Steps to correct energy readings:

  • 1. Verify configured wattage: In the thermostat settings, ensure the heater wattage matches the actual Stelpro heater rating plate.
  • 2. Use dedicated circuit: Ensure the thermostat controls only the intended heaters and not other loads that could skew readings.
  • 3. Compare with utility meter: For a rough check, compare thermostat-reported usage with your utility meter over a known period.
  • 4. Firmware update: Update the thermostat firmware to the latest version to correct any known metering issues.
  • 5. Replace thermostat: If readings remain wildly inaccurate despite correct configuration, the internal current sensor or metering circuit may be defective. Replace the thermostat.

Note: Energy data is an estimate and may not match utility billing exactly, but large discrepancies should be investigated.

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Repair Difficulty

Easy 2/5

Required Part

Stelpro Smart Thermostat Main Control Board (current sensing circuit)
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