How To Reset A MAIN HEATING Boiler

If your MAIN Heating boiler switches off unexpectedly, there’s no need to worry. In most cases, it’s simply the unit’s built-in safety system stepping in to prevent damage.

Similar to other modern boilers, MAIN Heating boilers detect issues such as reduced water pressure, ignition faults, overheating, or minor electrical interruptions.

When this occurs, the boiler enters lockout mode, the boiler temporarily shuts down, it does so to prevent the unit from damaging itself.

Before you hit reset, always check the display screen. MAIN Heating boilers will display error codes that guide you to the issue.

So, what are the most common error codes you’ll see when your MAIN Heating boiler activates lockout mode?

Common MAIN Heating Boiler Error Codes

Like other boiler brands, MAIN Heating boilers do encounter a few regular issues. Most of these problems are easy to fix on your own.

Here are some frequent MAIN Heating fault codes and what they mean:

It’s important to mention that these codes will differ depending on their age and model. Always consult your boiler’s manual.

If you can’t locate it, you can always check for it on the manufacturer’s website.

Now that we’re up to speed with what the most common error codes mean, let’s get to the primary reset methods.

How To Reset Your MAIN Heating Boiler

Resetting your MAIN boiler is usually straightforward. However, the exact method depends on your specific model. Generally, you’ll find one of these options:

• A dedicated Reset button: Often found on the front panel, sometimes near the power button or display screen.
• A control dial: Some models require turning the main control dial to a specific ‘Reset’ position and holding it briefly.
• Using the digital display: Newer models might have a reset option within the menu system, accessed via the control buttons.

Before You Reset: Quick Checks

Before hitting reset, it’s smart to run through a few quick checks to potentially fix the underlying issue. This is especially important if you saw an error code.

For example, if the error code was E133 (Ignition Failure), you’ll want to make sure your gas supply is actually turned on. Try lighting your hob – if it works, the gas is fine. If not, check your meter valve or contact your supplier.

If you saw E119 (Low Water Pressure), take a look at the pressure gauge on the front of the boiler. It should ideally sit between 1.0 and 1.5 bar when the heating is cold.

If the gauge is reading too low, you’ll need to top it up with the filling loop. On the other hand, if it’s crept up too high, you can bring it down by bleeding a radiator.

And lastly, don’t forget about the power supply. Sometimes the problem is as simple as the boiler not getting electricity.

Most MAIN boilers are wired to a fused spur. These fuse spurs are usually a white box switch with a fuse inside, mounted on the wall near the boiler. Flick it off and back on, or check your fuse box to make sure nothing has tripped.

Once you’ve worked through those checks, you can go ahead and perform the reset.

Depending on your model, you’ll either press and hold the reset button, turn the control dial, or use the digital display menu.

Give the boiler a minute to run through its restart cycle, then test your heating and hot water to see if it’s back to normal.

If the same fault code pops up again or the boiler refuses to restart, that’s a sign the problem is more serious and needs professional attention. At that point, it’s best to call a Gas Safe registered engineer and give them the error code you recorded.

When to Call a Professional

If your boiler refuses to reset or keeps locking out, stop trying to restart it. Forcing resets can cause more damage.

Instead:

• Call a Gas Safe registered engineer.
• Give them the error code you recorded.

At WarmZilla, we connect you with trusted engineers across the UK who specialise in MAIN Heating boilers, often helping within 48 hours.