83 Low

Alpha 83 Fault Code

The Alpha 83 fault code means: your boiler has been switched to 'off' mode, meaning it is currently preventing your heating and hot water from turning on.. It appears on 1 Alpha model in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: OFF MODE set on boiler

DIY fix possible

Locate the mode selector or dial on the front display panel of the boiler.Adjust the setting from 'Off' or 'Standby' to 'Winter' (radiator and tap icon) or 'Summer' (tap only icon).Press the reset button if the screen remains unresponsive after changing the setting.

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →
Boiler cover options

Avoid the next call-out bill

A cover plan would handle faults like 83: no call-out fees, no surprise bills.

Approved partner
Domestic Appliance Guard
Unlimited call-outs, 24/7 helpline, no price-hike promise
Get a quote →

Affiliate links. We may earn a commission at no extra cost to you.

Alpha models that show the 83 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Alpha 83 fault code information on this page is sourced and cross-checked against the official Alpha service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026