A058_F: Water Circuit Open
Status
This is a critical fault experienced by the furnace. The furnace will not operate in gas heat modes but all other modes(e.g. cooling) should function if a call is present.
Description
The IFC cannot detect electrical continuity between pins 1 and 2 of connector P4 of the furnace control. The IFC looks for continuity between these pins to determine if the water sensors (2) are present in the circuit. When both sensors are present and properly connected and wiring is not damaged, there should be electrical continuity between these pins.
Expected Operation
No gas heating operation can proceed and the fault is displayed. All other modes (e.g. cooling) of operation should operate as normal.
Cause
1. Wiring has been damaged between the control or sensor.
2. Connection of P4 at the IFC or at the water sensors is not properly made.
3. Water sensor has been removed.
Solution
1. Repair or replace wiring.
2. Repair connections or replace wiring or sensors or controls as necessary.
3. Replace missing water sensor.
