Baxi E117 Boiler Fault: Meaning, Symptoms, Actions, Costs, Causes, Prevention
The Baxi E117 boiler fault means your boiler’s water pressure is too high. It’s above the safe limit. Symptoms of this fault include the boiler displaying the E117 error code and shutting down to prevent damage. To resolve this, you need to turn off the boiler, release excess pressure, and ensure the filling loop valve is securely closed. Fixing the E117 fault can cost £50 to £150. It depends on whether parts like the pressure relief valve or expansion vessel need replacing. This fault often results from overfilling the system, a faulty filling loop, or issues with the expansion vessel or pressure relief valve. Preventative measures include: regularly monitoring the pressure gauge, correctly using the filling loop, and scheduling annual servicing. Always ensure a Gas-Safe registered engineer handles boiler repairs to maintain safety. In the next section, you will learn more about the meaning of the E117 fault and its implications for your boiler.
Meaning of the Baxi E117 Boiler Fault
The Baxi E117 boiler fault indicates that the water pressure in your heating system is too high. This error code activates when the system pressure exceeds the safe operational limit, usually above 2.5 to 3 bar. The boiler’s safety features prevent it from running under these conditions to avoid damage to its internal parts. Excessive pressure often comes from user error, a faulty pressure control component, or system expansion issues. Understanding this fault helps you take the right steps to prevent long-term damage and ensure safe boiler operation.
What does high water pressure mean for your boiler?
High water pressure means the water’s force exceeds the boiler’s limit. Excessive pressure can strain the boiler’s internal parts, like the pipes, seals, and heat exchanger. This can lead to leaks or a total system shutdown to prevent further damage.
What is the normal pressure range for a Baxi boiler?
The normal pressure range for a Baxi boiler is between 1.0 and 1.5 bar when the system is cold. During operation, pressure may rise slightly but should not exceed 2.5 bar. Regularly checking the pressure gauge ensures it stays within these limits.
Can high pressure damage the boiler?
Yes, high pressure can damage the boiler. It can overload parts like the expansion vessel and pressure relief valve. Prolonged exposure to excessive pressure increases the risk of leaks, burst pipes, and costly repairs.
How does the boiler regulate water pressure?
The boiler controls water pressure using parts like the expansion vessel and pressure relief valve. The expansion vessel absorbs pressure changes as water heats and cools. The pressure relief valve releases excess pressure when it is too high.
Is the E117 fault code specific to Baxi boilers?
The E117 fault code is specific to Baxi boilers and their diagnostic systems. Other boiler brands may have different codes or indications for high-pressure faults.
In the next section, you will explore the symptoms of the Baxi E117 fault in more detail to help you identify this issue promptly and accurately.
Symptoms of the Baxi E117 Boiler Fault
The Baxi E117 boiler fault causes noticeable issues related to the system’s water pressure. The most obvious symptom is the display of the E117 error code on the boiler’s control panel. The boiler may shut down for safety. You will lose heating and hot water. High pressure in the system may cause your radiators to be too hot or heat unevenly. The boiler may make unusual noises, like hissing or gurgling. This may indicate pressure-related strain on its internal parts. If unresolved, high internal pressure may cause water leaks from the boiler or nearby pipes.
How To Recognise The Baxi E117 on Different Types of Boilers
On Baxi Combi Boilers
On Baxi Combi boilers, the E117 fault code shows on the digital display. An error light or warning symbol accompanies it. The boiler will typically lock out, preventing it from providing heating or hot water. The pressure gauge on the front panel may read above 3 bar, clearly indicating high pressure.
On Baxi System Boilers
For Baxi System boilers, the E117 error code shows on the digital interface, like Combi models. The pressure gauge located on the front or side of the boiler will show elevated readings. Boiler-connected heating systems may fail to maintain consistent temperatures. This is due to automatic shutdown.
On Older Non-Digital Baxi Boilers
Older, non-digital Baxi boilers lack error code displays. So, the E117 fault shows up differently. You may see the pressure gauge rise above the recommended range (1.5–2.5 bar). The boiler may then fail to work properly. Radiators might overheat. The boiler may make unusual noises, like whistling or hissing.
The next section has steps to fix the Baxi E117 fault. They will help you do it safely and effectively.
What to Do When Your Baxi Boiler Shows the E117 Boiler Fault
When your Baxi boiler displays the E117 fault code, it means the water pressure is too high, and immediate action is required. First, turn off the boiler to prevent further strain on internal components. Check the pressure gauge to confirm if it is above the recommended range of 1.0 to 1.5 bar when cold. Use a radiator key to bleed the radiator. Collect the discharged water in a container. This will release excess pressure. Ensure the filling loop valve is securely closed to prevent more water from entering the system. If these steps do not resolve the fault, contact a Gas-Safe registered engineer for professional assistance.
Safety Disclaimer
Only perform actions described in your boiler’s user manual. Avoid opening the boiler casing or attempting internal repairs, as this is unsafe and can void your warranty. For any complex issues or if you suspect gas or water leaks, immediately consult a Gas-Safe registered engineer to ensure your safety.
How to turn off my Baxi boiler when the E117 fault appears?
To turn off your Baxi boiler, locate the main power switch, usually on the control panel or nearby wall. Switch it to the “off” position to prevent further operation until the fault is resolved.
Should I shut off the gas supply if I see the E117 fault?
You do not need to shut off the gas supply for a pressure-related fault unless you smell gas or suspect a leak. If you detect gas, immediately shut off the gas supply at the mains and contact a Gas-Safe engineer or your emergency gas provider.
Where is the pressure gauge on a Baxi boiler?
The pressure gauge is typically located on the front or side of the boiler’s casing. It displays the system’s pressure in bars, allowing you to confirm if it exceeds the safe range.
How to bleed a radiator to reduce boiler pressure?
To bleed a radiator, turn off the heating system and use a radiator key to slightly open the bleed valve. Allow water to escape slowly until the pressure gauge shows a reading within the recommended range. Close the valve tightly to prevent leaks.
Should I check for water leaks if the E117 fault occurs?
Yes, inspect the area around the boiler and nearby pipework for visible water leaks. High pressure can cause seals or connections to fail, leading to leaks. If you find a leak, turn off the boiler and consult a professional engineer.
Where to find a Gas-Safe registered engineer?
To find a Gas-Safe registered engineer, visit the Gas Safe Register website. You can contact your boiler manufacturer for recommendations. Or, reach out to our team for help.
Next, you will learn about the costs to fix the Baxi E117 boiler fault. This includes possible repairs and service fees.
Cost to Repair Baxi E117 Boiler Fault
Repairing the Baxi E117 boiler fault can cost £50 to £300. It depends on the cause and needed repairs. Minor fixes, like resetting the system or bleeding radiators, typically cost £50 to £100. Repairs that need replacement parts, like the expansion vessel or pressure relief valve, usually cost £150 to £300.
We offer full boiler cover for Baxi boilers. It helps with unexpected repair costs. A boiler cover contract gives you annual servicing and repairs for faults like the E117 error. It also ensures your boiler is professionally maintained. Boiler cover can save you money and reduce repair stress.
In the next section, you will explore the common causes of the Baxi E117 fault and how they relate to your boiler’s operation.
The 5 Major Causes of the Baxi E117 Boiler Fault
The Baxi E117 boiler fault is primarily caused by high water pressure within the heating system.
This fault may arise from:
- Overfilling the system.
- A faulty filling loop.
- A defective expansion vessel.
- A broken pressure relief valve.
- Blocked system components.
Understanding these causes helps you address the problem effectively and take steps to prevent it in the future.
1. Overfilling the System
Adding too much water to your boiler system during manual filling is a common cause of the E117 fault. When the system pressure exceeds 1.5 bar while cold, it can continue to rise during operation, triggering the error code. Overfilling often happens when the filling loop valve stays open too long. So, it’s essential to monitor the pressure gauge closely during filling.
2. Malfunctioning Filling Loop
A filling loop is responsible for adding water to your boiler system when pressure drops below the recommended level. If the filling loop is damaged, misinstalled, or not closed, it may let water into the system. This could raise the pressure to unsafe levels. Regularly inspecting and securing the filling loop can prevent this issue.
3. Defective Expansion Vessel
The expansion vessel absorbs pressure changes as water heats and expands. If the vessel’s diaphragm is damaged or it loses pressure, it cannot hold the expanding water. This causes the pressure to rise beyond safe limits, leading to the E117 fault. A qualified engineer can re-pressurise or replace the expansion vessel if needed.
4. Faulty Pressure Relief Valve
The pressure relief valve (PRV) is a safety device. It releases excess pressure from the system. If the PRV clogs, wears out, or fails, it can’t discharge pressure. This failure can let pressure build up, triggering the E117 error and causing more damage.
5. Blocked or Restricted System Components
Debris in the pipes or clogged filters can block the boiler. This can prevent water from circulating freely. Restricted water flow causes pressure to increase as the pump attempts to force water through the obstruction. Regular system maintenance and flushing can remove these blockages. They can also maintain proper pressure levels.
Next, you will learn about ways to prevent the Baxi E117 boiler fault.
Preventing Future Baxi E117 Boiler Faults
To prevent the Baxi E117 boiler fault, regularly check and maintain your heating system. Check your boiler’s pressure gauge now and then. It should be 1.0 to 1.5 bar when cold. Bleed your radiators to release trapped air. It can cause pressure imbalances. After adjusting the pressure, close the filling loop. This prevents excess water from entering the system.
The best prevention is to schedule annual boiler maintenance with an expert. A boiler cover contract includes yearly servicing and repairs for faults like E117. It provides peace of mind. Regular maintenance lets engineers check critical parts, like the expansion vessel and pressure relief valve. This ensures your system runs safely and efficiently.
Disclaimer
Only a Gas-Safe registered engineer may do work beyond the tasks in your boiler’s user manual. Injury, voided warranties, and a dangerous boiler can result from unqualified attempts to repair or access internal components. Always consult a professional for complex repairs or servicing.