04th December, 2023
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Last updated: 4th July, 2023
Guides
The complete guide to what each Baxi boiler error code means and how to fix it!
Is your Baxi boiler not working and displaying an unusual error code on its screen?
Worry not as these codes can be a great indication of what it is that is wrong with your boiler, helping either yourself or an engineer to know what needs to be done in order to fix it!
In this guide, we will be explaining what each Baxi fault code means and how to fix it.
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To begin with, it’s important for you to know how to reset your Baxi boiler model as this can often be the fix for many smaller issues.
The way in which you reset your boiler depends on what type of button or switch it has.
If your Baxi boiler has a dedicated reset button, simply press it until your boiler resets itself and the pilot light relights.
Sometimes, your boiler may lock out. This can be identified by the RED Lockout light constantly illuminating or flashing. In this case, simply hold the reset button until the red light goes away.
If your boiler has a boiler thermostat control knob, turn it fully anticlockwise and then turn it back to your desired setting.
If your boiler has an ON/OFF/SELECTOR switch, open the pull down panel and turn the selector switch to R (Reset) and hold for at least 5 seconds before releasing.
Now let’s jump into what each boiler error code means and how you can fix it.
Fault Code | Issue | How to Fix |
|---|---|---|
E20 | Central heating NTC error. | Your boiler will likely lock itself out. Call out a Gas Safe Registered Engineer to take a look. |
E28 | Error with the NTC, flue, air pressure switch or a blocked flue or condensate pipe. - Usually caused by a frozen pipe. | Turn your boiler off at the control panel and turn off the electricity at the wall. Locate the frozen pipe and warm it with either a hot water bottle or warm water poured from a watering can (NOT BOILING WATER) Turn the power back on and restart your boiler. |
E50 | Hot water NTC error. | Call out a Gas Safe Registered engineer to replace the hot water sensor and seal. |
E110 | Overheating error. | Bleed your radiators. If the issue persists, call out a Gas Safe engineer to check for blockages in the system. |
E119 | Low pressure. | Top up your boiler pressure. If the issue persists, call out a Gas Safe engineer. |
E125 | Circulation fault caused by low pressure. | Top up your boiler pressure. If the issue persists, call out a Gas Safe engineer. |
E130 | Flue operation error. | Check the outside flue terminal isn't blocked by a bird, or trees etc, and clear it if it is. If the issue persists, call out a Gas Safe engineer. |
E133 | Frozen condensate pipe. | Turn your boiler off at the control panel and turn off the electricity at the wall. Locate the frozen pipe and warm it with either a hot water bottle or warm water poured from a watering can (NOT BOILING WATER) Turn the power back on and restart your boiler. |
E160 | Fan system fault. | Call out a Gas Safe engineer to check fans. |
E193 | Pre circulation fault. | Call out a Gas Safe engineer to check the heat pump or heat exchanger for blockages. |
Fault Code | Issue | How to Fix |
|---|---|---|
110 | Overheating error. | Bleed your radiators. If the issue persists, call out a Gas Safe engineer to check for blockages in the system. |
117 | Water pressure too high. | Bleed your radiators. If the issue persists, call out a Gas Safe engineer to check for blockages in the system. |
118 | Water pressure too low. | Add water via the filling loop. If the pressure drops again, call out a Gas Safe engineer. |
125 | Circulation fault caused by low pressure. | Top up your boiler pressure. If the issue persists, call out a Gas Safe engineer. |
133 | Safety time to establish flame exceeded. | Ensure that the gas supply has not been turned off and reset your boiler. If the issue persists, call out a Gas Safe engineer. |
E10 | Outside sensor error. | Call out a Gas Safe Registered engineer to check the outside sensor. |
E20 | Central heating NTC error. | Your boiler will likely lock itself out. Call out a Gas Safe Registered Engineer to take a look. |
E28 | Error with the NTC, flue, air pressure switch or a blocked flue or condensate pipe - usually caused by a frozen pipe. | Turn your boiler off at the control panel and turn off the electricity at the wall. Locate the frozen pipe and warm it with either a hot water bottle or warm water poured from a watering can (NOT BOILING WATER) Turn the power back on and restart your boiler. |
E54 | Hot water sensor error. | Call out a Gas Safe Registered engineer to replace the hot water sensor and seal. |
E79 | Water pressure sensor and/or pump defective. | Call out a Gas Safe Registered engineer to check the water pressure sensor and/or pump. |
E100 | Internal clock time error on printed circuit board. (PCB) | Call out a Gas Safe registered engineer. |
Have you got a Viessmann, Worcester Bosch, Alpha or Ideal boiler and aren’t sure what the fault code means? Worry not! We’ve also created guides to the most common codes for all of these brands.
Check them out below:
Ideal Boiler Error Codes
For more advice and guidance when it comes to your home heating, check out our helpful blogs or get in touch with our friendly team at iHeat today!
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