The White-Rodgers 24A34-15 Heat Sequencer is a professional-grade SPDT (Single-Pole

the 56M13 and 56M1301 are technically identical parts and are interchangeable in all specified applications

ensuring the combustion blower maintains proper static pressure before allowing the ignition sequence to proceed

the X22440B7B ensures accurate refrigerant distribution across diverse system loads

If the vacuum is sufficient but the SPST contacts fail to close (continuity check)

Conbraco 17-402-04 Relief Valve The White-Rodgers 24A34-15 Heat SequencerThe Conbraco 17 402 04 Relief Valve is a high capacity, pressure only safety device engineered specifically for hot water heating boilers and hydronic systems. Featuring a rugged cast bronze body and a 3 4 inch MNPT inlet x 3 4 inch FNPT outlet, this ASME Section IV certified valve is factory set to 150 PSI. It provides critical protection against thermal expansion, supporting systems with a discharge capacity up to 934,000 BTU HR. Designed for