Baxi E134 fault codewhat it means and how to fix it
Baxi's "elapsed time — gas valve open without gas": the valve opened, nothing arrived. Check the meter and credit before anything else; it resets from the panel.
Take care
Do other gas appliances work?
The right answer depends on what you can see. Pick the one that matches.
Choose the option on the left that matches what your appliance is doing, and the answer for that case appears here.
No — the hob will not light
Supply problem. The boiler is right.
Meter credit, emergency control valve, or your gas supplier.
Yes, the hob is fine
Gas is reaching the house but not the burner: boiler gas cock, gas valve, or the boiler cannot see its own flame.
Check the cock under the boiler, reset once, then an engineer.
What E134 means
E134 is the most literal code in the Baxi table. The Duo-tec 2 Combi GA user guide prints it as "Elapsed Time — Gas Valve Open Without Gas", and Baxi's professional page expands it to "elapsed time gas valve open without gas (short request in a short period)". The 600 and 800 manuals group it with its neighbours — "133, 134 and 135 indicates that the gas supply has been interrupted, ignition has failed or the flame has not been detected" — and list it among the codes that can be relit by "pressing the Reset button for 1 to 3 seconds".
Where E133 is a general ignition lockout, E134 is the board saying that it has had the valve open for its full allowance of time and detected no gas at the burner, which is a statement about supply first and the valve second. In practice that means the meter (prepayment credit, an emergency control valve knocked shut, a supply interruption in the street), a gas cock on the boiler pipework closed after other work, or air in a supply that has just been reinstated.
If gas is demonstrably arriving at the boiler — the hob lights, an engineer measures working pressure at the test point — the fault moves inside: a gas valve that is not opening despite being told to, or a sensing electrode that cannot see a flame that is actually there. Baxi print E134 only on the digital-display boilers; a selector-switch Duo-tec HE or Platinum reports the same situation as E133.
What causes it
| Cause | What is actually happening | How likely |
|---|---|---|
| No gas at the meter | Prepayment meter out of credit, or the emergency control valve at the meter turned off. Baxi's user guides tell you to check the gas isolation cock is open and that a prepayment meter has sufficient credit. | Common |
| Boiler gas cock closed | The isolation valve on the gas pipe under the boiler is easy to knock or to leave closed after work on the kitchen. It should be in line with the pipe, not across it. | Common |
| Air in a newly reinstated supply | After a meter change or a supply interruption the pipework is full of air, and the first attempts to light purge it rather than burn. One or two resets are expected in that case. | Occasional |
| Gas valve not opening | The board energises the valve and nothing happens. Baxi's fault-finding treats a burner that never lights with gas present as an electrode, gas valve or PCB problem; the 600 and 800 valve is part 7683968. | Occasional |
What to try yourself
Try another gas appliance. If the hob will not light either, the problem is the supply or the meter, not the boiler.
Check the gas isolation cock under the boiler is open — the slot or handle in line with the pipe — and, on a prepayment meter, that there is credit and the meter is not showing an off message.
Press the Reset button for one to three seconds. Baxi list E134 among the codes this relights. If it comes straight back with gas confirmed at the hob, stop and call an engineer.
Do not reset repeatedly. Each attempt opens the gas valve again.
Get a Gas Safe registered engineer to look at your Baxi E134
We do not pass enquiries to a repair firm, so there is no form here. Find a Gas Safe registered engineer through the Gas Safe Register, and ask to see their registration card when they arrive — it is the register, not the van, that tells you they are qualified.
What it costs to fix
Typical repair cost
£0–£450
Time on site
15 minutes
Nothing if it is the meter or a closed cock. Gas valve (Baxi 7683968) fitted £280–£450.
Typical UK prices including parts and labour, updated September 2026. Your quote may differ.
Parts you may need
We may earn a commission if you buy a part through one of these links. It does not change what you pay, and it does not affect which parts we list.
Baxi / Potterton / Main detection and spark ignition electrode
7686344£25–£60Authorised Baxi parts distributor
Price checked 28 September 2026
Baxi / Potterton / Main gas valve
7683968£120–£240Authorised Baxi parts distributor
Price checked 28 September 2026
Own this appliance and had this code? . Nothing is published until a person has read it.
Related Baxi fault codes
- E133Get it checkedBaxi's ignition lockout: "the gas supply has been interrupted, ignition has failed or the flame has not been detected". Check the gas is on, reset once. If it returns, stop.Related: ignition and gas supply
- E.04.10Get it checkedIgnition failure on the Baxi 200/400 Combi and every Combi 2: the burner would not light after its allowed attempts. Baxi's own quick guide names it the frozen-condensate code you can fix yourself.Related: ignition and gas supply
- E128Get it checkedFlame failure while the burner was running, on the digital-display Baxis. The boiler relights itself unless it keeps happening; Baxi's manuals name gas supply, electrode and flue as the things to check.Related: ignition and gas supply
- E.01.04Stop — call an engineer"Flame loss detected five times in 24 hours": the burner keeps lighting and going out on a Baxi 200/400 Combi or Combi 2. Gas pressure, valve calibration, flue or electrode — an engineer's list.Related: ignition and gas supply
- E09Get it checkedGas valve connection cable fault on the 600, 800, Compact and Duo-tec 2. The board cannot talk to the valve. Baxi allow one reset; a repeat means the wiring or the PCB.Related: ignition and gas supply
- E135Get it checkedBaxi's "interruption of gas supply (internal error)". Same family as E133 and E134 but the manual calls it internal, so a reset that fails means the board or gas valve circuit.Related: ignition and gas supply
Own a Baxi boiler? Save it and its codes come first next time.
Related guides
Technical review
Not reviewed by an engineer
No engineer has read this page. Severity follows what the manufacturer publishes, and we would rather tell you that than let a byline imply a sign-off.
Sources and how we verified this
We establish the facts from the sources below and then write the explanation ourselves. We do not copy manufacturer wording and we do not host their manuals.
- Manufacturer technical and service documentation
- Manufacturer support portal
This page has not been reviewed by an engineer, and we would rather tell you that than imply otherwise. The severity rating follows what the manufacturer publishes: where they say isolate the appliance and call someone, so do we.