playing up again

[baggins]

Hi,
wonder if anybody can help, i was having problems with my heating system a few months back, i have a baxi solo 3 pfl 70 with a grundfos 15-60 pump.
I got the problem sorted out, turned out to be the pcb in the boiler anyway i had a new pump fitted, a new 3 way valve fitted and also a new timer fitted a drayton lp522.Everything was working great until last week when we went on holiday and the MRS wanted me to switch the timer off while we were away.Came back sunday and switched it back on again and at first what was happening was the timer came on to heat the water and this it did but when the timer went off the boiler continued to heat the water.Monday i noticed that when the timer comes on to heat the water the boiler switchs off.when i hit the advance button to tell the timer not to heat the water the boiler switchs back on and vice versa when i put the hot water on the boiler switchs off.
Any advice would be great, thanks.

 

[doitall]

Sounds like whoever did the job has the wires crossed.

 

[baggins]

hi it would seem like that but its not because the job was done months ago and it has been fine.i have rang the chap and he is going to get another timer and come back sat to have a look.
Cheers