Low
P01 on Alpha Pro Tec Plus

The boiler is currently displaying its current central heating temperature setting rather than an actual fault.

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.

What the manual says

Manufacturer manual

Set CH flow temp.

From this model's manual
Verified against the Alpha Pro Tec 24 installation & service manual, page 36.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Check if the display returns to normal after a few secondsConsult your user manual to confirm this is the standard standby screenEnsure your heating controls are set to your desired room temperature

Find a Gas Safe engineer
Search the official register →

Avoid the next call-out bill

A cover plan would handle faults like P01: 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.

Related fault codes

Related guides you might find useful