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Jeffrey CollinsNov 2, 2025
What to do if Magnetrol TD2 indicates a fault (red LED blinks)?
- GgregoryshafferNov 2, 2025
If the Magnetrol Switch indicates a fault, and the red LED is blinking, the solution depends on the cause: * **Liquid Level – Sensor Wet:** Verify HEATER (TD1) / HTR (TD2) is set to “–”. Change HEATER/HTR to “+”. If the light goes off, contact the factory to discuss the application. If the light stays on, check the resistance to determine if a problem exists with the probe or electronics. * **Liquid Level – Sensor Dry:** Verify HEATER (TD1) / HTR (TD2) is set to “–”. Turn off FAULT (TD1) / FLT (TD2). If the light goes off, operate in this mode. If the light stays on, check the resistance to determine if a problem exists with the probe or electronics. * **Liquid Flow – Sensor Dry or Air Flow – None:** Turn off FAULT (TD1) / FLT (TD2). If the light goes off, run HEATER/HTR at “+” and ...
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