20308981 SCS PILOT ASSEMBLY - HHT – Natural Gas – Electronic
20308981 SCS PILOT ASSEMBLY - HHT – Natural Gas – Electronic
⚠ Special order — Ships in 1–2 weeks
What This Part Does
The 20308981 pilot assembly is a Natural Gas Electronic ignition component responsible for lighting the pilot flame and confirming flame presence in an electronic ignition system.
In an electronic (IPI) system, the control module sends a signal to generate a spark at the pilot assembly while allowing gas flow. Once the pilot flame is established, the flame sensor detects its presence and signals the system to open the main gas valve.
This assembly combines the ignition source and flame sensing function, allowing the system to safely ignite and monitor the pilot before the main burner is activated.
Proper pilot assembly operation is essential for reliable ignition, safe operation, and consistent fireplace performance.
Not sure if this is the right part?
Before ordering, check the following:
- Locate your model number (typically behind the lower louver or inside the control compartment)
- Confirm your unit uses a Electronic system
- Confirm your gas type is natural gas
- Compare your existing pilot assembly to the images provided
⚠️ This part is NOT for a different ignition/control system systems
⚠️ This part is NOT for propane (LP) units
If unsure, refer to your manual or contact us for help identifying the correct part.
🔁 Using propane (LP) instead of natural gas?
This part will not work. View the correct LP version here: 20308982
Compatible Models
Majestic Gas Fireplaces:
300DVBC
300DVBH_7
300DVBL_7
300DVBNSCSL
400BBVA
400BBVNSC
400BBVNVA
400BBVPVA
400DVB_7
400DVBC
400DVBH
400DVBH_7
400DVBL
400DVBL_7
400DVBNSC7
400DVBNSCSL
400DVBPSCSL
400SBVNSC
400SBVNVA
400SBVPVA
500DVB_7
500DVBC
500DVBL
500DVBL_7
500DVBNSCSL
500DVW
500MDVPNSC
500MDVPPSC
500SBVNSC
500SBVNVA
500SBVPVA
600DVB_7
600DVBC
600DVM
600MDVPNSC
600MDVPPSC
BDV300C
BDV400C
BDV500C
BDV600C
CDVR42
CDVR47
ICFDV30C
ICFDV30CNTSCSB
ICFDV30L
ICFDV30LNTSCSB
ICFDV40C
ICFDV40CNTSCSB
ICFDV40LNTSCSB
ICFDVC
WDVP500PTSC
Majestic Gas Stoves:
HBDV400
Monessen Gas Fireplaces:
30ICFDVC
BDV300_7
BDV400_7
BDV500_7
BDV600_7
BLDV300_7
BLDV300NSCSL
BLDV300PSCSL
BLDV400
BLDV400_7
BLDV400NSCSL
BLDV400PSCSL
BLDV500
BLDV500_7
BLDV500NSCSL
BLDV500PSCSL
CDVR33(7) (T-Lock)
CDVR33_7
CDVR33_V117
CDVR36
CDVR36_7
CDVR42_7
CDVR47_7
CDVT33(7) (T-Lock)
CDVT33_7
CDVT36(7) (T-Lock)
CDVT36_7
CDVT42(7) (T-Lock)
CDVT42_7
CDVT47(7) (T-Lock)
CDVT47_7
CLLDVPPSC
CRLDVPPSC
HBDV300
HBDV300_7
HBDV400_7
MDV500
MDV600
ML500DVPNSC
ML500DVPPSC
WDVP500NTSC
Monessen Gas Stoves:
MLDV500
Vermont Castings Gas Fireplaces:
BVPNSC
BVSTNSC
CLLDVPNSC
CRLDVPNSC
PFLDVPNSC
PFLDVPPSC
SDVTSCBD
SDVTSCBM
SDVTSCBS
SDVTSCCB
STLDVPNSC
STLDVPPSC
VC31CDVI
VC31CDVINTSC
VC41CDVI
VC41CDVINTSC
VLI31DV
VWDVP70NTSC
Vermont Castings Gas Stoves:
BVST
CLLDV
CRLDV
HDV500
PFLDV
RADVTSCBD
RADVTSCBM
RADVTSCBS
RADVTSCCB
STLDV
VWDV70
WDV500
System Type
This is an electronic ignition system, commonly called an IPI system or intermittent pilot ignition system. Instead of keeping a pilot flame burning continuously, the fireplace lights the pilot only when there is a call for heat.
IPI systems use a control module to manage ignition, flame sensing, gas valve operation, and safety shutdown functions.
This system commonly includes:
- Control module — controls spark, flame sensing, and gas valve operation.
- Electronic gas valve — opens and closes gas flow to the pilot and main burner.
- Igniter / flame sensor assembly — creates spark and confirms flame presence.
- Battery backup or power supply — provides operating power for ignition and control functions.
These systems offer improved efficiency, remote-control compatibility, and added safety features, but they also include more electronic components than a millivolt system.
Common Problems This Part Fixes
If your fireplace uses an electronic ignition (IPI) system, the pilot assembly is responsible for igniting the pilot flame and proving flame presence to the control module. When it begins to fail, it can cause ignition issues or system shutdowns.
Replacing the pilot assembly often resolves the following problems:
- Spark is present but pilot will not light
The pilot assembly may not be delivering gas properly or the ignition point is worn or misaligned. - Pilot lights but shuts off shortly after
The flame sensor is not properly detecting the pilot flame. - Continuous clicking or sparking without ignition
The system is attempting to light, but the pilot assembly is not establishing flame. - Intermittent ignition or delayed startup
Worn or dirty components can cause inconsistent ignition performance. - No spark at the pilot
A damaged or grounded igniter electrode may prevent spark generation. - Weak or unstable pilot flame
A clogged pilot orifice or worn assembly can affect flame quality.
Important Note
These symptoms can also be caused by a faulty control module, wiring issues, or gas supply problems. Proper diagnosis is recommended before replacing the pilot assembly.
Warranty Information
This product includes a 12-month warranty from the date of purchase. This warranty covers defects in materials or workmanship under normal operating conditions.
Fireplace components must be properly installed and matched to the correct system (millivolt vs IPI, natural gas vs propane).
This warranty does NOT cover:
• Improper installation or incorrect application
• Use with the wrong gas type (NG vs LP)
• Misdiagnosis of the issue
• Damage caused by other failing components
• Normal wear and tear
• Labor, service, or diagnostic time
Because many fireplace issues can be caused by multiple components, we strongly recommend confirming the diagnosis before replacing parts.
We are happy to assist with this. Proof of purchase is required for all warranty claims. Please contact us prior to removal or replacement of the part so we can help verify the issue and guide the warranty process.
Do I need any special tools to install this?
Most pilot assemblies can be installed using basic hand tools, and no specialized equipment is typically required.
In most cases, you will need:
• Adjustable wrench or open-end wrenches
• Screwdrivers (Phillips and/or flathead)
• Nut driver or socket set
The pilot assembly is usually mounted near the burner and connected by a pilot tube and thermocouple or thermopile. Installation involves removing the old assembly, reconnecting the gas line components, and securing the new pilot in place.
It is important to ensure all connections are tight and properly aligned. After installation, always check for gas leaks using a leak detection solution and confirm proper pilot flame appearance.
If you are unsure or uncomfortable working with gas components, we recommend having a qualified technician perform the installation to ensure safe and proper operation.
Do I need to make any adjustments after installation?
In most cases, no major adjustments are required after installing a pilot assembly, but a few important checks should always be performed to ensure proper operation.
After installation, you should:
• Verify the pilot flame is steady and properly positioned over the thermocouple or flame sensor
• Confirm the flame is strong enough to fully engulf the sensor (not weak or lifting)
• Check all gas connections for leaks using a leak detection solution
Some systems may include a pilot adjustment screw on the gas valve. If needed, this can be used to fine-tune the pilot flame height, but many modern systems are preset and do not require adjustment.
If the pilot flame appears weak, unstable, or does not stay lit, this may indicate an issue with gas pressure, air in the line, or another component in the system.
Proper flame appearance and stable operation are key to safe and reliable performance. If you are unsure about flame characteristics or adjustments, we recommend consulting a qualified technician.
How difficult is this part to replace?
Replacing a pilot assembly is generally considered a moderate repair and can often be completed by a homeowner with basic mechanical skills.
The process typically involves accessing the burner area, disconnecting the pilot tube and sensor leads, removing the old assembly, and installing the new one in the same position.
While no specialized tools are usually required, the work does involve gas connections and components that must be installed correctly to ensure safe operation.
For someone comfortable working with hand tools and following instructions carefully, this is a manageable repair. However, access to the pilot assembly can vary depending on the fireplace model, and some units may require additional disassembly.
If you are unsure about working with gas systems or identifying proper flame characteristics after installation, we recommend having a qualified technician perform the replacement.
How do I know if my pilot assembly is bad?
A bad pilot assembly will usually show clear symptoms related to ignition problems or unstable flame performance.
Common signs of a faulty pilot assembly include:
• Pilot will not light at all
• Pilot lights but will not stay lit
• Weak, small, or flickering pilot flame
• Pilot lights but the main burner does not turn on
• Intermittent operation or frequent shutdowns
In many cases, the issue is caused by a worn or failing thermocouple or thermopile, a clogged pilot hood, or a damaged ignition component. Dirt, dust, or corrosion can also affect how the pilot flame contacts the sensor.
A proper pilot flame should be steady, strong, and fully engulf the thermocouple or flame sensor. If the flame is weak, not making good contact, or going out unexpectedly, the pilot assembly may need to be cleaned or replaced.
Before replacing the assembly, it is also important to rule out other possible causes such as low gas pressure, air in the gas line, or a faulty gas valve.
If cleaning does not resolve the issue or the components show signs of wear or damage, replacing the pilot assembly is often the most reliable solution.