2281-012 PILOT ASSEMBLY, – Natural Gas – Electronic

Compatible Models

Heatilator Gas Fireplaces:
HEIR36H
HEIR36T
HEIR42H
HEIR42T
HEIR50H
HEIR50T

Heat-N-Glo Gas Fireplaces:
TRUE-36C
TRUE-36H
TRUE-36S
TRUE-42C
TRUE-42H
TRUE-42S
TRUE-50C
TRUE-50H
TRUE-50S

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.

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.

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.