Step1: Shut off gas and electrical power, then check zero gas flow using proper test equipment.
Step2: Remove front panel and label all gas line and electrical connections for reference.
Step3: Disconnect old valve from inlet/outlet fittings and pilot tubing, then remove mounting hardware.
Step4: Install the new control valve, ensuring correct flow direction and secure threaded connections.
Step5: Reconnect pilot and main gas lines, tighten all fittings, restore supply, and test for leaks and proper burner ignition.