Check for a cracked ceramic insulator on the spark rod or carbon buildup on the sensor electrode

Is the 0130R00003SP compatible with older Goodman units

meaning it resets itself once the temperature drops below its specific differential setpoint

protecting heat exchangers

Laars Heating Systems 2400-056 Operating Control 320819-301 Check for a cracked ceramicAs a veteran tech, you know that consistent performance in HWG and CB boilers depends on precise cycling and thermal management. The Laars Heating Systems 2400 056 Operating Control is the specific "New Style" replacement engineered to maintain a strict 210 degree Fahrenheit high limit or operating setpoint. For contractors servicing Mark II 9600 series commercial units or Mark II H series residential models, this 210 degree aquastat is essential for