F02 Fault Code for Boilers

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HTP: F02 Fault Code for Boilers: SUPPLY SENSOR: Indicates that the supply temperature sensor of the boiler has failed. This is a serious safety issue and the boiler will not restart until the sensor is replaced by a technician and he pushes the RESET button on the display. This situation is indicated by the red light on the display and the flashing word LOCKOUT. During this lockout fault, the pump will be on as indicated on the second line of the display. • 1. Check the electrical connection to the thermistor on the outlet manifold. Verify 5 VDC by checking in Molex connector. If there is no 5 VDC, check the harness. If harness is OK, replace control. NOTE: The boiler will reset automatically. Verify thermistor values by referencing chart in this manual. • 2. Replace thermistor if necessary. • I Feel You • Kevin MacLeod (incompetech.com) • Licensed under Creative Commons: By Attribution 3.0 • http://creativecommons.org/licenses/b...

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