Can I reset my U.S. Boiler (Burnham) boiler to clear the High Limit / Outlet High Temperature code?

You can reset once if your manual says it's safe. If the code returns, stop resetting — repeated resets on a genuine fault, especially gas or overheat faults, can be unsafe and may worsen the problem. Book a licensed repair instead.

Is the High Limit / Outlet High Temperature fault dangerous?

Treat it as urgent. This code involves systems where continued operation can be unsafe. Turn the boiler off if it keeps recurring and call for a licensed repair; if you smell gas, leave and call your gas utility's emergency line.

How much does it cost to fix a U.S. Boiler (Burnham) High Limit / Outlet High Temperature fault?

Cost depends on the underlying cause — some causes (like low pressure or a dirty sensor) are minor, while others (like a gas valve or control board) cost more. We diagnose first and give you a clear price before any repair.

U.S. Boiler (Burnham) Error Code

U.S. Boiler (Burnham) Error Code High Limit / Outlet High Temperature

The outlet water temperature exceeded the safe limit.

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If your U.S. Boiler (Burnham) combi boiler is showing error code High Limit / Outlet High Temperature, here's what it means: The outlet water temperature exceeded the safe limit. This is an urgent fault. Stop using the boiler if it keeps recurring and book a licensed repair promptly — especially if it involves gas, ignition, overheating or the flue.

U.S. Boiler (Burnham) boilers report faults using sage controller fault codes on alpine and k2 condensing boilers. Knowing the code helps a technician arrive prepared with the right parts, which usually means a faster, lower-cost repair.

What causes the High Limit / Outlet High Temperature code?

Error High Limit / Outlet High Temperature on a U.S. Boiler (Burnham) boiler is most commonly caused by one of the following:

Poor circulation or failed pump
Airlock
Closed valve
Scaled heat exchanger

What you can safely check first

Note the exact code and your boiler's model number
Check the pressure gauge — low pressure triggers many faults
Confirm the gas supply is on and other gas appliances work
Reset the boiler once, per the manual, only if it's safe to do so
If the code returns, stop and call a licensed technician

Why this needs a licensed technician

Resolving a High Limit / Outlet High Temperature fault almost always involves the gas, combustion, sensor or pressurized side of the appliance. Under BC's Safety Standards Act, that work must be performed by a licensed gas fitter — and doing it correctly protects your warranty and your safety. We diagnose U.S. Boiler (Burnham) boilers, carry common parts, and verify clean combustion before returning your boiler to service.

Smell gas or suspect carbon monoxide? Leave now.

If you smell gas, hear hissing, or your CO alarm sounds, leave the building immediately and call your gas utility's emergency line from outside. Do not operate switches or relight the appliance. Once you are safe, call us for a licensed repair.

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Frequently Asked Questions

Other U.S. Boiler (Burnham) codes & help

U.S. Boiler (Burnham) Ignition FailureThe Sage control attempted ignition but proved no flame, …U.S. Boiler (Burnham) Flame Detected Out of SequenceThe control sensed a flame when none should be present.U.S. Boiler (Burnham) Flame LossThe flame was lost during a heating or DHW call.U.S. Boiler (Burnham) Low Water CutoffThe low-water cutoff tripped, indicating low system water…U.S. Boiler (Burnham) Outlet Sensor FaultThe outlet (supply) sensor reads open or short.All U.S. Boiler (Burnham) Error CodesFull list

Fix Your U.S. Boiler (Burnham) High Limit / Outlet High Temperature Fault

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