A00.00 Low

Remeha A00.00 Fault Code

Also written as A0000 — same fault.

The Remeha A00.00 fault code means: your boiler is currently running normally but has detected a minor issue that requires attention before it potentially stops working altogether.. It appears on 1 Remeha 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: Warning: The boiler continues to operate but the cause of the warning must be investigated. A warning can change into a blocking or lock-out.
Typical repair cost £90-180 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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 A00.00: 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.

Remeha models that show the A00.00 fault code

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

Source

Remeha A00.00 fault code information on this page is sourced and cross-checked against the official Remeha service / installation manuals for each affected model.

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