50978 H.B. Smith Pilot Assembly – With Igniter & Flame Sensor (PSE-NA29)
🔍 Product Overview
The H.B. Smith 50978 Pilot Assembly comes complete with igniter and flame sensor (PSE-NA29) for reliable ignition and flame detection.
Designed for natural gas (NG) applications, this pilot assembly is compatible with GVX-70, GB100, and GB300 Series boilers.
⚠️ For LP (propane) applications, a separate orifice (Part # 50998) must be ordered.
This pilot assembly ensures consistent flame monitoring, proper ignition, and safe operation of your boiler system, helping maintain optimal performance and efficiency.
🌟 Key Features
✅ Complete Pilot Assembly – Includes igniter and flame sensor (PSE-NA29)
✅ Compatible with Natural Gas – Orifice needed separately for LP applications (#50998)
✅ Fits Multiple Boiler Series – GVX-70, GB100, GB300
✅ Reliable Flame Sensing – Ensures safe and consistent burner operation
✅ Easy Replacement – OEM-quality fit and function
⚙️ Technical Specifications
| Specification | Details |
|---|
| Part Number |
50978 |
| Brand |
H.B. Smith |
| Pilot Type |
NG Pilot Assembly with Igniter & Flame Sensor (PSE-NA29) |
| Fuel Type |
Natural Gas (NG); LP requires separate orifice #50998 |
| Compatible Boilers |
GVX-70, GB100, GB300 |
| Igniter Type |
Spark / Electronic |
| Flame Sensor |
PSE-NA29 |
| Orifice Required for LP |
Yes – #50998 |
| OEM / Aftermarket |
Genuine OEM Replacement |
⚠️ Common Symptoms (When Replacement is Needed)
-
Burner fails to ignite or pilot does not light
-
Intermittent flame or flame failure
-
Igniter sparks but burner does not fire
-
No heat output despite gas supply
-
Burner lockouts or frequent restarts
❓ Frequently Asked Questions (FAQ)
Q1: Which boilers use the 50978 pilot assembly?
➡️ GVX-70, all GB100, and all GB300 series H.B. Smith boilers.
Q2: Can this pilot be used for LP gas?
➡️ Yes, but a separate LP orifice Part #50998 must be ordered.
Q3: What flame sensor does it include?
➡️ Includes the PSE-NA29 flame sensor.
Q4: Is this an OEM part?
➡️ Yes, it is a genuine H.B. Smith OEM replacement.
Q5: How do I know if my pilot needs replacing?
➡️ Check for ignition failure, frequent lockouts, or no flame detection by the sensor.
🛒 Shopping Tips
✅ Verify your boiler model (GVX-70, GB100, GB300) before ordering.
✅ Ensure fuel type matches the pilot assembly (NG standard, LP requires separate orifice).
✅ Replace the pilot and flame sensor together for reliable operation.
✅ Keep spare orifice #50998 if converting or running LP gas.
