TSTAT ERROR
Energy Kinetics Thermostat or Zone Input Fault

Display shows TSTAT ERROR or THERMOSTAT FAULT; zones do not call for heat correctly.

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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

Shorted thermostat wires, Open thermostat circuit, Miswired zone control, Failed zone relay on Energy Manager

How to Fix / Troubleshooting

Safety: Turn off power before opening the control panel or thermostat.

  • 1. Check thermostat settings: Ensure thermostats are set to HEAT and above room temperature. Replace batteries in digital thermostats.
  • 2. Inspect thermostat wiring: At the Energy Kinetics zone board or Energy Manager, verify that thermostat wires are connected to the correct zone terminals and are not shorted together.
  • 3. Test zone operation: Manually jump the thermostat terminals for the affected zone at the control. If the zone starts, the thermostat or its wiring is suspect.

Persistent TSTAT ERROR may indicate a failed zone relay or control board, which should be replaced by a technician.

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Repair Difficulty

Medium 3/5

Required Part

Zone Control Board / Energy Manager
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