Ideal Control Module F560 Slave 174674

The Ideal 174674 is a slave control module — a printed circuit board that forms part of the control assembly on Ideal Commercial boilers. It is the left-hand slave PCB, working alongside the main control board to manage the appliance's sequencing and safety-related control functions. It is listed by the manufacturer as the control module slave left for the Imax Xtra range.

• The boiler fails to fire or drops into a lockout that will not clear on reset
• Fault codes relating to control board communication or slave module faults appear on the display
• Heating or hot water operation becomes intermittent, with the appliance starting and stopping without a clear pattern
• The control panel or display is unresponsive, or the boiler behaves erratically after a power cycle
• Visible damage to the board — scorching, burnt tracks, swollen capacitors or corrosion from water ingress

• Confirm the exact appliance model and variant, as the E560 and F560 use different control configurations
• Check the existing board against the part number 174674 and the alternative number 1780850 before ordering
• Note the boiler serial number and any stored fault codes so the correct board is matched to the appliance
• Work on boiler controls should be carried out by a competent engineer; isolate the electrical supply before removing or fitting any PCB