ideal response 80 combi boiler

[reece]

can any one help me my boiler just packs up for a few days then decides
to work the pressure drops quite quickly and i have to top up regularly used to happen once a month and come on after a day but now stops every two days and takes 2-3 days to come on again. Had a plumber round
and he has'nt got a clue! Anyone had any similar problems.

 

[kevplumb]

is the pressure being dumped through the pipe outside

 

[reece]

is the pressure being dumped through the pipe outside

How do i check that

 

[kevplumb]

see if the pipe gets wet/damp when the pressure drops

 

[croydoncorgi]

see also //www.diynot.com/forums/viewtopic.php?t=22241.
(In that case, there's a leak in the HX from HW to CH. Yours may be from CH to inside of boiler combustion chamber)

After checking the pressure relief valve (pipe outside) and around all the rad valves, etc., check also very carefully that there's no sign of water under the boiler or dripping down around the pipes.

 

[reece]

see also //www.diynot.com/forums/viewtopic.php?t=22241.
(In that case, there's a leak in the HX from HW to CH. Yours may be from CH to inside of boiler combustion chamber)

After checking the pressure relief valve (pipe outside) and around all the rad valves, etc., check also very carefully that there's no sign of water under the boiler or dripping down around the pipes.

The outside copper pipe is leaking. ive been told I need an expansion vessel replacement and a pressure relief valve quoted at £400 can anyone tell me if this is the ongoing price?

 

[croydoncorgi]

PRV part cost - roughly £15
Auxiliary exp. vessel (assuming you really need one and the boiler part can't be removed) about £60

About 2 - 3 hours work to fit.

You work it out, according to local rates, etc.

 

[kevplumb]

vessel might only need recharging