Ideal Printed Circuit Board BCC Logic Heat System 177861

The 177861 is a printed circuit board supplied by Ideal for its Logic Heat and Logic System range. It carries the BCC designation used on the Logic platform and acts as the main control board, handling ignition sequencing, fan and pump control, temperature regulation and fault monitoring. The board is the interface between the boiler's sensors, gas valve and user controls, so a failure here typically stops the appliance from running at all.

• The boiler shows no display or the display stays blank when power is applied
• The appliance locks out repeatedly and will not reset from the control panel
• No response to a call for heat, with the pump or fan failing to start
• Intermittent faults, random error codes or the boiler dropping out mid-cycle
• Visible damage on the board itself, such as scorching, burnt tracks or swollen capacitors

• Confirm the GC number and model on the appliance data badge, as the Logic Heat and Logic System variants use different board configurations
• Check the existing board's part number against 177861 and the alternative number 1783164 before ordering
• Inspect the wiring harness and connectors for heat damage, as a faulty loom can mimic a board failure