Have small 2.5 bedroom terraced house, which seven days ago had a worcester greenstarRi boiler fitted on the back wall in the kitchen to replace the 25 yr old potterton boiler that live in a tiny boiler shed outside.
After installation it took a few days for all the rads to come on tickerty boo. Was told by the fitters when they left that the air in the system had to work its way out.
Today its 4 degrees outside, and since i had to go to the shops i decided to press the manual button to delay the heating coming on. when i came back later I switched the timer back to auto and was conscious of waiting a long time for the rads to heat up. The thermostat was set to 21 centigrade and the temperature downstairs was about 17. The green light came on the boiler indicating that it had fired up. The heat control on the front of the boiler is set to three quarters on.
Now the heat on from the *old* boiler started warming up the rads downstairs after about twenty minutes.
This afternoon i kept a log of what was going on, since nothing much seemed to be happening by way of the rads heating up.
After an hour and a quarter the small radiator in the ground floor rear room/kitchen was hot. The big radiator in the same room was barely warm. Also barely warm were the radiator in the grd floor front room and also all three bedrooms upstairs were barely warm. The towel rail in the bathroom though was hot.
This suddenly all seems so much slower than a few days before. After one and half hours both radiators in the two main bedrooms upstairs are still not very hot, more like very warm. And finally after some 2 and a half hours they are all hot except the first floor rear bedroom is kind of hot, but not brilliant.
The Grundfos AlphaA2 pump is on the 'II' setting.
It all seemed to be working a lot better a couple of days ago, but this is the first time i interupted the auto setting on the timer and turned it off and on again manually.
Novis grateful for any suggestions.