Burnham Boiler Error Code 6 — Meaning & Repair in Greater Vancouver
If your Burnham Alpine boiler is displaying code 6, the control is telling you that it has detected a stack (flue gas) high limit condition — the flue-gas temperature measured at the stack sensor has exceeded its safe limit. On Burnham Alpine units this code is reported by the Honeywell SOLA control as a hard lockout. Below, the gas-licensed team at ROMA Heating & Cooling explains what the code means, what typically triggers it, whether it is a safety concern, and how we repair it properly across Greater Vancouver.
| Detail | What it means on your Burnham Alpine |
|---|---|
| Code | 6 |
| Control type | Honeywell SOLA control |
| Fault family | Hard Lockout |
| Plain-language meaning | A stack (flue gas) high limit condition — the flue-gas temperature measured at the stack sensor has exceeded its safe limit |
| Recommended action | Shut the boiler off and call ROMA at (604) 704-0300 |
What Burnham Code 6 Means
Code 6 on a Burnham Alpine boiler indicates a stack (flue gas) high limit condition — the flue-gas temperature measured at the stack sensor has exceeded its safe limit. In practical terms, the boiler’s safety and operating control has recognized a condition it is not permitted to run through, so it has stopped the burner and displayed the code to flag exactly what it saw. The Alpine reports this as a hard lockout, which is the control’s way of protecting the appliance and your home until the underlying issue is identified and corrected by a qualified technician.
It is important to understand that the code is a symptom report, not a repair instruction. It tells a trained technician where to begin a structured diagnosis — it does not mean the problem is something a homeowner should attempt to open up, test, or reset. Burnham boilers are gas-fired pressurized appliances, and accurate diagnosis depends on proper combustion analysis and electrical testing.
What Typically Causes Code 6
On Burnham Alpine boilers, code 6 is most often associated with the following underlying conditions. This list is informational only, to help you understand what your technician will be investigating — it is not a set of steps to perform yourself:
- A fouled or scaled heat exchanger forcing more heat up the flue instead of into the water
- Improper combustion or an over-fired burner
- A failed or mispositioned stack (flue gas) temperature sensor
- Restricted water flow through the heat exchanger
Several of these causes can look identical from the front panel, which is why ROMA relies on instrument-based diagnosis rather than guesswork. Replacing a part without confirming the real cause can leave a Burnham boiler tripping the same code again.
Is Code 6 a Safety Concern?
Code 6 is a safety-related lockout. If your Burnham Alpine boiler is showing this code, the safest step is to leave it switched off and call ROMA Heating & Cooling for professional diagnosis rather than putting it back into service.
Yes. Abnormally high flue-gas temperature can indicate a combustion or heat-exchanger problem and creates a heat and venting risk. Shut the unit off and call immediately.
- Turn the boiler’s service switch to the off position.
- Do not keep cycling power in an attempt to clear the code.
- If you smell gas, leave the area and contact your gas utility’s emergency line, then call ROMA.
- Call ROMA at (604) 704-0300 for professional emergency diagnosis and repair.
How ROMA Repairs It
When you call ROMA Heating & Cooling about a Burnham Alpine showing code 6, a gas-licensed, insured technician follows a methodical process:
- We read the control’s fault history and confirm the exact code and the conditions present when it tripped.
- We perform the appropriate electrical, sensor, gas-pressure, and combustion checks for a hard lockout fault on this control platform.
- We isolate the true root cause — not just the symptom — so the repair holds.
- We repair or replace the failed component using genuine Burnham / U.S. Boiler OEM parts.
- We verify safe combustion and proper operation before returning the boiler to service.
Because ROMA has served Greater Vancouver since 1999 and our technicians are gas-licensed and insured, you get an accurate diagnosis and a repair done to code — with the right OEM parts for your Burnham Alpine.
Same-Day Emergency Burnham Boiler Service
A locked-out boiler — especially one showing a safety code like 6 — should not wait. ROMA Heating & Cooling offers same-day emergency Burnham boiler diagnosis and repair across Vancouver, Burnaby, Richmond, Surrey, Coquitlam, Port Coquitlam, Port Moody, New Westminster, North Vancouver, West Vancouver, Delta, Langley, Maple Ridge, and the North Shore. Call us at (604) 704-0300 and a gas-licensed technician will get your heat and hot water restored safely.
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Frequently Asked Questions
What does code 6 mean on a Burnham boiler?
On a Burnham Alpine boiler, code 6 means the control has detected a stack (flue gas) high limit condition — the flue-gas temperature measured at the stack sensor has exceeded its safe limit. It is reported by the Honeywell SOLA control as a hard lockout, which stops the burner until the issue is professionally diagnosed.
What causes a Burnham boiler to show code 6?
Code 6 can stem from several underlying conditions, including a fouled or scaled heat exchanger forcing more heat up the flue instead of into the water among others. Because more than one cause can produce the same code, ROMA uses instrument-based diagnosis to find the real source rather than guessing.
Is Burnham code 6 dangerous?
Yes. Code 6 is a safety-related lockout on Burnham Alpine boilers, so the unit should stay off until a gas-licensed technician inspects it. If you ever smell gas, leave the area and contact your gas utility’s emergency line, then call ROMA at (604) 704-0300.
Can a Burnham boiler showing code 6 be repaired?
Yes. In most cases a Burnham Alpine with code 6 is fully repairable. ROMA’s gas-licensed technicians diagnose the root cause and repair or replace the failed component with genuine Burnham / U.S. Boiler OEM parts, then verify safe operation before leaving.
Who should I call for a Burnham boiler showing code 6 in Greater Vancouver?
Call ROMA Heating & Cooling at (604) 704-0300. We provide same-day, gas-licensed Burnham boiler diagnosis and repair across Metro Vancouver, and we do not recommend attempting any DIY checks on a gas boiler.
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