the internal bimetal disc has failed and the HVAC safety switch requires replacement

While it responds to pressure

Its internal pilot design ensures consistent performance even in fluctuating pressure systems

ensuring that high-limit events caused by restricted airflow or venting issues are addressed immediately

the crossover ports may be degraded

Robertshaw 700-424 Gas Valve Els PW 29614 the internal bimetal disc hasThe Robertshaw 700 424 is a high capacity 24V diaphragm gas valve engineered for precision fuel control in demanding commercial and residential heating environments. This 2 stage gas valve is factory calibrated for natural gas with a standard setting of 3. 5" WC (Water Column), supporting a high performance capacity of up to 300,000 BTU. Designed with a 3 4" FPT inlet and outlet, the 700 424 utilizes a 7000BGVER series body that provides secondary