If your Main Eco Compact is showing E270, Baxi’s current fault-code table describes it as “Dry fire”. That is the manufacturer’s short label for the fault. It does not mean you should look for a visible fire, and it does not identify one failed component.
The boiler has stopped because its safety controls have detected an operating condition they will not allow to continue. Keep the casing closed, avoid repeated resets and arrange a repair if the code does not clear after the one normal reset permitted by your model’s instructions.
What Main Eco Compact E270 means
“Dry fire” is a technical term used when heating is detected without the water-side conditions the appliance expects. In plain English, the boiler is protecting itself because heat and water movement do not appear to be behaving together normally.
Baxi’s public error-code table does not expand E270 into a list of causes. It therefore would be wrong to say from the display alone that the boiler is empty, that the pump has failed, that a sensor is faulty or that a blockage is present. Those are matters for proper testing.
The code is a safety response and a useful starting point for an engineer. It is not an instruction to fill, drain, bleed or open the boiler.
Which boilers can show E270?
Baxi’s current table includes Main Eco Compact Combi and Main Eco Compact System in the model group that uses E270. Several related Baxi and Potterton boilers use the same code, but the exact appliance and installation still need to be identified.
A Main Eco Compact Combi provides heating and hot water directly. A Main Eco Compact System works with a separate hot-water cylinder. Record the complete model name because the household symptoms and the engineer’s checks can differ.
What you may notice at home
E270 may interrupt a heating or hot-water demand. You could notice:
- the boiler starts and then stops before the radiators warm;
- the heating remains cold despite a demand from the thermostat;
- a combi boiler does not produce hot water normally;
- a system boiler stops heating the radiators or cylinder circuit;
- the displayed temperature changes quickly before the code appears;
- the code returns after the boiler has apparently reset;
- some radiators behave differently from others.
These details can help an engineer understand the sequence, but none proves the cause. A noise, a pressure reading or one cold radiator should not be used to guess which internal part needs attention.
Safe checks and observations
Keep the boiler casing closed. The following information is useful and can be collected without internal work:
- Photograph E270 and any display symbols.
- Note whether heating, hot water or both were being requested.
- Record how long the boiler ran before it stopped.
- Read the normal front pressure gauge and write down the figure without changing it.
- Look for obvious water leaks around visible radiators and exposed pipework.
- Note whether all radiators are affected or only certain rooms.
- Record any other fault code shown before or after E270.
- Tell the engineer about recent radiator, valve, boiler or heating-system work.
If the appliance starts but then stops, our guide to a boiler that turns off explains other household details worth recording. E270 still requires checks specific to the Main Eco Compact.
Can you reset Main Eco Compact E270?
The Main Eco Compact user guide distinguishes between resettable errors and errors that are not resettable by the user. If your display shows the resettable-error symbol and your exact model’s instructions allow it, you can try one normal reset using the front control.
On the referenced Main Eco Compact Combi guide, the reset button is pressed for approximately one second; holding it for more than two seconds will not reset the boiler. Follow the guide for your own appliance because controls can vary.
If E270 remains or returns, stop resetting. A reset gives the boiler another opportunity to run its checks; it does not repair the condition that produced the code.
Should you change the boiler pressure?
Do not assume that E270 is simply a low-pressure code. Baxi separately lists E118 as low water pressure and E430 / 166 as a temporary water-pressure fault. E270 has its own “dry fire” description.
Record the gauge reading for the engineer. Only use a filling arrangement if the exact user guide clearly instructs you to do so for the pressure displayed and you already understand the approved controls. Do not keep adding water in an attempt to chase E270. Repeated pressure loss, a visible leak or uncertainty about the filling arrangement needs professional attention.
What not to do
- Do not remove the boiler cover.
- Do not touch or test the pump, sensors, valves or internal wiring.
- Do not drain, flush or chemically treat the system to clear the code.
- Do not improvise a filling connection or leave a filling loop open.
- Do not enter installer menus or alter safety parameters.
- Do not repeatedly bleed radiators or add water without the model instructions.
- Do not buy a pump, sensor or control board from the code alone.
- Do not keep forcing the boiler through reset cycles.
Internal work on a gas boiler must be carried out by a suitably qualified Gas Safe registered engineer. The engineer can check the stored fault information and the real relationship between heat, pressure and water movement using the correct procedures.
How E270 differs from related codes
Several Main Eco Compact codes can affect heating but describe different conditions:
- E118 is listed as low water pressure below 0.5 bar.
- E125 is listed as a water-circulation fault.
- E154 is a flow-and-return plausibility test.
- E270 is listed as dry fire.
Because Baxi gives these separate meanings, E270 should not be silently relabelled as one of the others. Photograph the exact code, particularly if the display changes after a reset.
When to arrange a repair
Book a repair if E270 remains after the one permitted reset, returns during later use, or leaves the household without reliable heating or hot water. Provide the model name, display photo, pressure reading and notes about when the code appeared.
If there is a visible water leak, protect the surrounding area without opening the boiler and mention it when booking. If a professional has isolated the appliance or labelled it unsafe, do not turn it back on.
Gas and carbon-monoxide safety
E270 is not a gas-leak code. Normal gas safety still applies: if you smell gas, suspect a leak or think the appliance is unsafe, do not reset or operate it. Open doors and windows, turn off the gas at the meter if you know how to do so safely, leave the affected area and call the National Gas Emergency Service on 0800 111 999.
If a carbon-monoxide alarm sounds or anyone has possible symptoms such as headache, dizziness, nausea, breathlessness or unusual tiredness, move into fresh air and seek urgent medical help. Do not use the boiler again until it has been checked and declared safe.
Restore reliable heating or hot water
Book a fixed-price boiler repair that aims to fix the E270 fault, with the cost agreed before the engineer visits.
Quick answers about Main Eco Compact E270
What does E270 mean?
Baxi lists E270 as “Dry fire”. The boiler has stopped after detecting a protected heating and water-side condition it will not allow to continue.
Does E270 mean there is a visible fire?
No. “Dry fire” is a technical fault label. Do not open the casing to look for anything inside.
Is E270 definitely a pump fault?
No. The code does not confirm a failed pump or any other single part. Testing is required.
Can I reset E270?
Try one reset only if your exact model’s display and guide show that the error is resettable. If it returns, arrange repair.
Should I top up the pressure?
Record the gauge reading first. E270 is not the same as Baxi’s dedicated low-pressure codes, so do not repeatedly add water to chase it.