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Furnace or boiler calls for heat but pilot or main burner never establishes flame due to failed SmartValve gas flow or sequencing control.
System repeatedly cycles through ignition trial (90-second attempts) and locks out without sustaining a pilot flame, caused by valve operator failure.
Intermittent pilot lights momentarily but the main gas operator does not open, resulting in no heat output despite normal thermostat signal.
Multimeter confirms 24V AC at valve terminals during a heat call but gas flow is absent, indicating internal valve solenoid or operator failure.
SmartValve loses pilot flame signal causing premature shutdown; the integrated sensing circuit inside the valve body is no longer functioning correctly.
💡 Pro Tip: Diagnosing a Failed SmartValve Gas Valve
Your part is likely the culprit if you notice any of the following:
⚠️ Furnace or boiler ignites the pilot but main burner never lights
⚠️ System goes through ignition trial and locks out without establishing flame
⚠️ Pilot lights but extinguishes immediately; continuous retry cycling is audible
⚠️ No gas flow detected at the main burner despite 24V signal at valve terminals
Use a multimeter to verify 24V AC is present at the valve's operator terminals during a call for heat. If voltage is confirmed but the main valve fails to open, the SmartValve body is faulty and requires replacement. Always shut off gas supply and disconnect power before servicing.
📦 What's in the Box
✅ 1× SV9501M2528 SmartValve Gas Valve Assembly (1/2" NPT, Standard Opening, 24V)
✅ 1× LP Gas Conversion Kit (393691)
✅ 1× 4-Pin Harness Assembly (395474)
✅ 1× Installation Instructions Sheet
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Disclaimer: Compatibility information, part numbers, and model fitment data on this page are sourced from manufacturer databases and third-party references. While we strive for accuracy, please verify your appliance model number before ordering. Heima is not responsible for errors or omissions in compatibility listings.
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