Last updated on November 12th, 2023
Worcester boiler condensate traps can get very dirty and eventually blocked if they are not cleaned out which means your boiler will not fire up.
They get full of all sorts of weird gunk and sometimes bees and other insects that get in through the flue terminal outside.
I have been servicing boilers for over a decade and I have cleaned my fair share of Worcester boiler condensate traps.
Here I’ll explain how to clean and give my best advice based on my on-the-job experiences over the years.
How to Clean Worcester Boiler Condensate Trap
If you have your boiler serviced regularly then your condensate trap should be cleaned out then.
If not, then cleaning it every year or so could stop it from getting blocked and causing your boiler to lock out.
To clean a Worcester boiler condensate trap you need to remove it from the boiler and run it under a tap and keep shaking it vigorously while keep filling it with cold water and emptying it.
How to remove a Worcester boiler condensate trap:
- Turn the boiler off and isolate the electric supply at the spur if possible
- Remove the casing
- Remove the black rubber tube on the side of the condensate trap
- Push the clip up on top of the trap with a small screwdriver
- Twist the trap anti-clockwise
- Pull it forward to remove it from the boiler
Make sure to have a bucket underneath to catch any condensate water that comes out.
How to clean and refit a Worcester boiler condensate trap:
- Pour out the dirty condensate wastewater from the trap into a sink and fill it with fresh water
- Shake the trap vigorously and empty
- Repeat until all the gunk inside the trap is removed
- Fill with water and hold straight above the sink, let the water come out of the bottom
- Fit the trap on the connection at the top and click into place
- Refit the black rubber tube
Worcester Boiler Condensate Trap Full of Water
A Worcester boiler condensate trap should always be full of condensate wastewater. This is completely normal.
When it fills with water from the flue it will partially empty out of the bottom and into the condensate pipe and then to the drain.
Having the condensate trap full of water stops the poisonous flue fumes from coming through the trap.
This is what traps are made for. Just like traps on sinks are always full of water to stop smells and creepy crawlies coming through.
If your Worcester boiler condensate trap is not emptying at all, then it must be blocked.
Worcester Boiler Condensate Trap Blocked
If your condensate trap is blocked then you need to clean it out.
If it’s blocked with solid substances that can’t be removed then you will need to replace the condensate trap.
Cleaning or replacing the trap will unblock it but if it’s still not working then it’s probably your boiler condensate pipe blocked.
You will need to find and fix the blockage in the condensate pipe.
If your condensate pipe is frozen then this will need to be thawed out before resetting the boiler.
You should also learn how to stop a condensate pipe freezing in a cold winter.
Cleaning a Worcester boiler condensate trap is easy but it is recommended to get your boiler serviced every year and the trap will be cleaned during the service.
If you’re just starting out as a heating engineer then this will be one of the easiest jobs to learn and a very common one to do.
Feel free to ask me any questions in the comment section below and I’ll try my best to help.
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Should a Worcester boiler condensate trap be full of water?
Yes, a condensate trap on a Worcester boiler should always be full of water. When the trap is full to the brim it will partially drain but they are designed to be full of water.
Where is the condensate trap on my Worcester boiler?
The condensate trap a Worcester boiler is inside the boiler at the bottom and slightly to the left. You can’t miss the trap once the casing is removed.
How do you stop a Worcester boiler condensate pipe freezing?
To stop a Worcester boiler condensate pipe freezing in the winter you can insulate the pipe outside and fit a trace heating cable.