How to fix E119 on a baxi boiler
What is E119 Error Code on a Baxi combi boiler?
The E119 error code on a baxi boiler indicates that there is a problem with the boilers low water pressure. This fault specifically indicated that the sensor has detected a water pressure reading that is below the minimum required for the boiler to operate.
If E119 error code is flashing on the front of your boiler, the first thing you should do is check on the water pressure. The recommended amount for most of the baxi boiler is between the big green triangle on the pressure gauge, this is 1 bar to 1.5 bar pressure. If the pressure is lower than 1bar you can try to repressurize the boiler using the combi filling loop under the boiler. This can be a loop which goes from your cold pipe to your return pipe with two levers or it can be a baxi filling loop which is made for the baxi boilers this will again be on the cold pipe to the return pipe but will be integrated with the valves underneath the boiler.
This is a example below:
Combi Filling Loop
Baxi Filling Loop
(On the pictures above both filling loops are open the way to close the filling loops are to turn the lever so it crosses the pipe rather than goes in line with the pipe)
How to choose the right boiler:
Size always matters. You will need to determine the size of your property and the heating requirements needed. A professional load calculation can help you determine the correct boiler size needed, ensuring optimal performance and energy efficiency. Energy efficiency ratings are also a important consideration especially in the current life situation. It is always best to find yourself a boiler with a high energy efficiency rating this will save you money on your energy bills and reduce your environmental impact. Fuel type, budget and any specific requirements or preferences you may have will also play a huge role in your decision making.
How To Fix
Here’s some steps to repressurise your boiler:
- Make sure the boiler is cooled down or off.
- Make sure both the isolation valves underneath the boiler are open (Cold Pipe and Return Pipe)
- Locate the Filling Loop, this is the normally the baxi filling loop normally connected to the bottom of the baxi boiler if you can’t see that on the boiler, look for a standard combi filling loop on the pipework below,
- Open both valves on the filling loop this will allows the water from the cold pipe to supply for the heating system. Top Tip - Open the levers in direction with the pipe. Close the levers across the filling loop.
- Monitor the pressure gauge on the boiler. Ideally you want the pressure in the range of 1 and 1.5 bar when the boiler is off or cold.
- Once the pressure is within the recommended range, close both valves on the filling loop.
- Switch on the boiler and check that it is working properly.
It is very important to watch and be cautious when repressurizing a boiler, and always follow the manufacturer’s instructions and guidelines.
This will normally solve the E119 Error code issue if it doesn’t it could also be a fault with the low water pressure sensor, Wiring, Printed Circuit Board or even the pressure gauge itself, all these options will involve calling out a qualified engineer to check the boiler.
Causes of E119 error code
The E119 error code is mainly because the pressure is to low this is then sending a signal to the water pressure sensor to say that the boiler does not have enough pressure to work efficiently and effectively. Why does it do this?
Pressure: The pressure is being lost in the system somewhere. This is normally caused by a few things:
The system will have a flow pipe from your boiler in this case a baxi boiler, and will go through the house to the radiators this then returns back to the boiler. Somewhere In that pipework there may be a leak.
Radiators are normally one of the main causes for the E119 error code. The radiators will all have TRV’S (thermostatic radiator valves). These are the valves what are on both sides of your radiator connecting to the pipework. They are very prone to leaking or dripping. It doesn’t have to be a big leak to lose the pressure on the boiler.
Every time you bleed a radiator you are releasing pressure from the system so when this happens you must refill the system to maintain the correct pressure needed for the boiler to work.
A PRV is an important device that is designed to release excess pressure from the system to prevent the boiler/system from exceeding a safe level.
The pressure gauge is to detect how much pressure is in the system. Sometime the needle can break on the pressure gauge this will then give a false reading.
This is designed to monitor the water pressure within the boiler and detect if it falls below a certain threshold. The sensor is typically connected to a control system that is responsible for regulating the flow of water into the boiler. If the sensor detects that the water pressure has dropped below 1bar it will send a signal to the printed circuit board and shut off the heating elements to prevent damage to the system.
The pressure inside the expansion vessel is maintained by a pre-charged air cushion, which compressed as the water pressure increased however the air cushion can become depleted, leading to increased pressure inside the vessel. When the pressure inside the expansion vessel exceeds a certain threshold, the pressure relief valve is activated, and water is released from the vessel through the PRV. A big sign to tell that this is happening is that from your boiler you have a copper pipe that leads to normally the outside wall of the building, if this pipe is dripping it is a big sign that your expansion vessel or PRV is broken. In such cases you would have to call a qualified engineer
This can be caused by a build up of debris or sludge in the pipes.
If your boiler is needing to be topped up more than once a week, it could indicate there is a leak somewhere, which should be inspected and repaired by a qualified technician.
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