If your smart meter HAN light is solid green, it usually means something in the Home Area Network is not working as it should. That often points to a commissioning, pairing or communication issue — especially if your gas meter or in-home display is not working properly.

HAN Light Solid Green — What It Means and What To Do

If your smart meter is showing a solid green HAN light, do not panic — but do take it seriously.

This is a common smart meter issue and it usually means the Home Area Network has not been set up properly, has not completed commissioning cleanly, or is not communicating the way it should.

In many cases, the meter is installed, powered up and looks fine — but the smart side of the setup is not fully working behind the scenes.

What is the HAN?

HAN stands for Home Area Network.

It is the internal smart meter network inside your home that links together:

the electricity meter
the gas meter
the in-home display

If the HAN is not working properly, those parts of the system may not be talking to each other properly — even if the meter itself is still on and recording usage.

What does a solid green HAN light usually mean?

A solid green HAN light often suggests the HAN connection has not been fully established or is not operating correctly.

That can happen when:

the smart meter was installed but never fully commissioned
the gas meter was not paired properly with the electricity meter
the in-home display never joined the system correctly
the setup was interrupted by a weak WAN or communications issue
you switched supplier and the smart setup was not re-established cleanly

Important: the light pattern is a clue, not a full diagnosis on its own. The real issue is usually confirmed by what is and is not working elsewhere in the system.

What problems can this cause?

If the HAN side is not working properly, you may notice things like:

your in-home display not showing live usage properly
your gas meter not operating in smart mode
your supplier not receiving one fuel correctly
estimated bills instead of actual smart readings
the smart meter appearing only partly functional

One of the classic signs is that electricity seems fine but gas is not communicating properly.

Does it affect your bills?

It can do, yes.

If your HAN has not been set up properly, your smart meter system may not be sending or sharing data the way it should. That can lead to:

estimated bills instead of actual readings
missing gas readings
usage on the display not matching the bill
the supplier asking for manual readings

What should you do first?

Step 1 — Contact your supplier

Tell them exactly what you can see.

You could say:

“My smart meter is showing a solid green HAN light and I do not think the smart meter system has been fully commissioned or paired properly. Please investigate whether the gas meter, electricity meter and in-home display are communicating correctly.”

Being specific helps. If you just say “my meter is not working”, suppliers often default to vague or generic replies.

Step 2 — Ask what they have checked remotely

The supplier will often try a remote fix first. That is reasonable, but ask what they have actually checked.

For example:

can they see the electricity meter remotely?
can they see the gas meter remotely?
is the gas meter paired to the electricity meter?
does the supplier believe this is a HAN problem, a commissioning problem, or something else?

If the supplier just says “we’ll try again remotely” without explaining what it is doing, push for more detail.

Step 3 — Push for an engineer visit if needed

In many cases, a solid green HAN issue needs a qualified engineer visit to resolve properly — especially if the setup was never completed cleanly in the first place.

Ask:

what date will the engineer attend?
will they have what they need to complete commissioning or pairing on the day?
what happens if the visit does not resolve it?

Step 4 — Check the result after the visit

Do not assume the problem is fixed just because somebody attended.

Check:

has the HAN light changed?
is the in-home display now showing live usage?
can the supplier now see your readings remotely?
is the gas meter now operating in smart mode?

If the engineer leaves without fixing it, or says it cannot be fixed without a clear explanation, contact the supplier again straight away and make sure the visit is logged as unresolved.

What should your supplier do when you report it?

Once you formally report a smart meter problem, your supplier should not just leave the case drifting.

Under Ofgem’s live smart meter rules, the supplier should carry out an initial assessment, take action that helps identify the issue, and offer written confirmation of what it found and what it did within 5 working days. [oai_citation:1‡Ofgem .pdf](sediment://file_00000000c2b47243b7ec4fc645bcef30)

Important: that does not mean the full issue must always be fixed within 5 working days. It means the supplier should start investigating properly and not just send a vague acknowledgement. [oai_citation:2‡Ofgem .pdf](sediment://file_00000000c2b47243b7ec4fc645bcef30)

Read your smart meter rights in 2026

What if you recently switched supplier?

A supplier switch can sometimes expose or interrupt an existing commissioning or HAN problem, especially if the system was never fully clean in the first place.

If your meters were working before the switch and then the smart setup started misbehaving, raise it directly with your new supplier and make them explain what it can and cannot see remotely.

Related: Smart meter switching problems

What usually fixes a solid green HAN problem?

The most common fixes are:

recommissioning the smart meter system
repairing the pairing between gas and electricity meters
rejoining the in-home display properly
dealing with a wider communications issue that blocked commissioning in the first place
an engineer visit to complete the setup properly

That is why this kind of problem often sits in the grey area between “meter installed” and “smart system actually working.”

What if your supplier keeps delaying?

If your supplier keeps giving vague replies, repeated remote attempts with no explanation, or no clear next step, stop treating it as an informal query and put it in writing.

If the complaint drags on and is still unresolved after 8 weeks — or you get a deadlock letter sooner — you can usually escalate to the Energy Ombudsman.

Generate a formal complaint letter

Start the free Smart Meter Health Check

Create an issue timeline in the Smart Meter Tracker

Related help

Smart meter signal problems explained

WAN light flashing — what it means

Smart meter not sending readings

Gas meter not connecting to electricity meter

All advice on SmartMeterHelp is independent. We are not affiliated with any energy supplier.