Combi losing water - pressure gauge high

Combi losing water - pressure gauge high

Combi losing water - pressure gauge high

Hi, our Worcester combi boiler has an issue ( around 10 years old, sorry it doesn't state a model on the front).

It loses water.

Today I topped up the water to 1.5, turned on the heating for 1 hour, pressure gradually goes up to 3 (in the red) and it drips water out of the pipe outside (overflow?)

Is the above description enough to point to a particular faulty part?

I will get a plumber but just wanted to see if I could identify the issue at all based on the above.

Thanks

by Swell1

This has been automatically posted in the DIYNot Forum on DIY Talk. The new DIY Forum