MasterStat 110423-2 - User Manual

Questions and Answers

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catherine03Aug 11, 2025
What to do if the MasterStat Thermostat fan motor doesn't work or has issues with fan speed?
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  elizabeth35Aug 11, 2025
  If the MasterStat Thermostat fan motor isn't working, or you're experiencing issues with fan high or low operation, the first thing to check is the LCD display for a flashing 'Pre-Wet' indicator. This means the fan is off until the pre-wet cycle completes. Also, make sure that the fan motor leads are correctly connected to the Fan Hi, Fan Lo, and N connection screw terminals on the Appliance Control Board. Verify that the colors of the thermostat cable match the color description on the Appliance Control Board and that all wires are firm and secure. Finally, confirm that the jumper wire across “Link” and “Nlink” is connected properly. Note: Use the jumper wire only when fan and pump voltages are the same.
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Vickie RussoAug 20, 2025
What to do if the MasterStat 110423-2 water or purge pump doesn't work, even though the LCD indicates it's on?
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  annaphelpsAug 20, 2025
  If the MasterStat Thermostat water or purge pump isn't working but the LCD on the wall control indicates it's on, first check the water pump terminals on the appliance control board to ensure they are correctly connected. Also, verify that the thermostat cable colors match the color description on the appliance control board and that all wires are firm and secure.
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Mark McdonaldOct 31, 2025
How to troubleshoot a MasterStat Thermostat with a cooler that doesn't work and no LCD display?
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  Andrew Parker MDOct 31, 2025
  If the MasterStat Thermostat cooler isn't working and the wall control LCD is blank, start by checking the wiring between the wall control and the appliance control board. Ensure the three wires are correctly connected at both ends, following the correct wiring order, and that the terminals are securely fitted. Also, verify that the power supply circuit breaker is on and that the appliance control box is properly connected to the power supply. Supply voltage should be present between the Supply L1 and Supply N terminals on the appliance control board. Another potential cause is a blown fuse in the appliance control box, so inspect the fuse on the appliance control board, checking for any incorrect wiring. Replace the fuse with the correct type if needed. Finally, the appliance control boar...