Hi, sorry, I now there have been similar threads but thought I would post my own specific circumstances and the investigations so far
9 Year old Worcester 38 Cdi (combi) Losing pressure over the last week. Basically I fill it in the morning to 1.5/2 bars and by bedtime (10.30 ish) it's down to zero and has to be refilled in the morning. Checked the radiators, no leaks upstairs or downstairs. Tied a small clear plastic bag to the wee copper overflow pipe, nothing going in. We are lucky enough to have decent crawlspace under the house so had a look there, no obvious leaks from the pipework or damp patches on the dirt floor. (we've had about 4 refills that have been lost so I'd expect to see something). There is a lot of verdigris on one join in the pipework directly below the boiler under the house where the pipe goes into some component (?) but it seems bone dry now (then again the heating is on now). The pressure only rises a little bit as per normal when I turn the heating on.
Did have a plumber out (due back soon) and he thought it might be the expansion vessel but when he hooked it up to a pump he said it wasn't taking much air and now thinks it might be the heat exchanger which will be costly obviously.
Just wondering what folks here thought might be the problem based on the information given. Also, is it worth getting the heat exchanger replaced or is it better to get a new boiler?
Thanks in advance
9 Year old Worcester 38 Cdi (combi) Losing pressure over the last week. Basically I fill it in the morning to 1.5/2 bars and by bedtime (10.30 ish) it's down to zero and has to be refilled in the morning. Checked the radiators, no leaks upstairs or downstairs. Tied a small clear plastic bag to the wee copper overflow pipe, nothing going in. We are lucky enough to have decent crawlspace under the house so had a look there, no obvious leaks from the pipework or damp patches on the dirt floor. (we've had about 4 refills that have been lost so I'd expect to see something). There is a lot of verdigris on one join in the pipework directly below the boiler under the house where the pipe goes into some component (?) but it seems bone dry now (then again the heating is on now). The pressure only rises a little bit as per normal when I turn the heating on.
Did have a plumber out (due back soon) and he thought it might be the expansion vessel but when he hooked it up to a pump he said it wasn't taking much air and now thinks it might be the heat exchanger which will be costly obviously.
Just wondering what folks here thought might be the problem based on the information given. Also, is it worth getting the heat exchanger replaced or is it better to get a new boiler?
Thanks in advance
