NTI Boiler: Replace the burner
Replace the burner on a NTI boiler: Burner swap on the TRX150 means pulling the cover, the combustion assembly and then the burner. Replace every seal that looks damaged, because reused seals are how combustion leaks start.
Applies to: TRX150
Common causes of replace the burner
- Burner damaged or worn out
- Hardened or torn seals and gaskets on the combustion assembly
- Water or gas valves left open during the swap
How to fix replace the burner: step by step
- Power off the boiler and the circuit breaker, close the gas valve and isolate the water valves.
- Remove the front cover and pivot the electronics housing out of the way.
- Remove the combustion assembly.
- Remove the burner and inspect it.
- Replace the burner and all damaged seals or gaskets.
- Reassemble in reverse order and check for leaks, gas first, then water.
- Fire the boiler and watch the flame and the first full cycle.
Safety: Gas, electrical and refrigerant work must be done by a licensed technician. Turn off power and gas before servicing, never bypass a safety control, and always follow the manufacturer's manual for your exact model.
If the unit shows an error code, look it up: NTI Boiler codes
Source: NTI TRX150 manual, p. 98. Written in our own words as a summary; always check the original manual.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.