Main Combi 24 PCB 5112657. Part No.5112657. Other Part No. SMCOE01 | SMC0E01 | SM11450U | SM11450. Main Combi 24 (GC No. 47-474-01). Main Combi 24 HE (GC No. 47-474-02). We currently are able to accommodate the oldest and deprecated boilers to the very latest energy-efficient central heating systems.
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