Patterson-Kelley · Error codes
Patterson-Kelley 276 — Damper End Switch Closed
276
Damper End Switch Closed. The damper end switch failed to open indicating an inoperative damper system. 1. If an air inlet damper is used, check operation of the damper and end switches. 2. Ensure wiring of the AIR DAMPER INTERLOCK is correct. 3. Ensure the parameters for the damper are correctly set
Applies to
This fault code is displayed by the NURO touchscreen control with Sola burner control on MODU-FIRE FD (N750–N3000) and THERMIFIC VELOX (N750–N2000) appliances equipped with the NURO touchscreen control, as documented in NURO Advanced User's Guide, doc 1004905979 Rev G (March 2016), Appendix C Error Reference Table (1004905979 Rev G). Codes can differ between controller generations, so always check the manual that matches your unit.
- Patterson-Kelley P-K MODU-FIRE FD
- Patterson-Kelley P-K THERMIFIC VELOX
- P-K MODU-FIRE FD N750
- P-K MODU-FIRE FD N1000
- P-K MODU-FIRE FD N1500
- P-K MODU-FIRE FD N2000
- P-K MODU-FIRE FD N2500
- P-K MODU-FIRE FD N3000
- P-K THERMIFIC VELOX N750
- P-K THERMIFIC VELOX N1000
- P-K THERMIFIC VELOX N1500
- P-K THERMIFIC VELOX N1700
- P-K THERMIFIC VELOX N2000
Controller: NURO touchscreen control with Sola burner control. Source manual: 1004905979 Rev G (2016-03).
Why a code is not a diagnosis
The code reports the condition the control detected; the underlying cause must be confirmed on site by a licensed technician using the manufacturer's procedure.
Safe things to observe
- Note the exact code, when it appears and what the appliance was doing.
- If the appliance has stopped, call a technician rather than repeatedly restarting it.
- If you smell gas, stop, go outside and call your gas utility's emergency line or 911 before anything else.
Do not
- Do not ignore a code that returns after a reset.
How professional service helps
- A licensed technician diagnoses the cause with the manufacturer's test procedure.
- Combustion and safety devices are verified with an analyser and the manufacturer's procedure after any repair.
Where ROMA provides on-site service
On-site service is currently offered in Greater Vancouver, BC, including Vancouver, Burnaby, Richmond, Surrey, Coquitlam, North Vancouver, West Vancouver, New Westminster, Port Coquitlam, Port Moody, Delta, Langley, Maple Ridge, Abbotsford, Chilliwack, White Rock, Pitt Meadows, Tsawwassen, Anmore, Lions Bay, Belcarra, Bowen Island, Mission. Everything else on this site is reference information you can use anywhere in Canada.
Parts and service
Parts commonly involved
These parts appear in the documented text for this alert. A code reports a condition, not a failed part — a technician confirms the cause by testing before anything is replaced.
Flue damper
A flue damper is a motorized blade in the vent connector of an atmospheric boiler that closes when the burner is off to stop heat escaping up the…
What a technician checks →
Service for this alert
- Gas Boiler Repair
Licensed gas technicians from ROMA Heating & Cooling diagnose and repair residential and light-commercial gas boilers across…
Every boiler part explained — what it does, how it fails and what a technician checks.
Documented for Patterson-Kelley P-K MODU-FIRE FD and Patterson-Kelley P-K THERMIFIC VELOX.
Frequently asked questions
Can I clear this code myself?
Clearing a code without fixing its cause usually just brings it back. Note the code, check the safe items on this page, then call a licensed technician. If your appliance manual describes a user reset for this exact code and it stays away, no call may be needed.
Boiler locked out? Call with the alert text ready.
The brand, model and this alert are passed along when you request service online, so the technician arrives prepared.
On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.
Sources and verification
- NURO Advanced User's Guide, doc 1004905979 Rev G (March 2016), Appendix C Error Reference Table · 1004905979 Rev G · accessed September 9, 2026
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.