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The Honeywell 3 port valve on my heating system has part number 40003915-003. I can't find this listed anywhere so I assume it is obsolete. It was installed when I moved in 23 years ago so it's quite old now. It's now stuck with CH and HW both open. Does anyone know if a direct replacement is...

About 2 years ago I noticed water coming from the overflow of my central heating header tank.This tank is located in the loft but there is no access to it. The previous owner put all the water tanks in the tiny loft and then put the roof on!! (Honestly). I reasoned that if I shut off the stop...

I have been conducting an electricity audit in my house as my bills are too high. I replaced two halogen bars (4 x 50 W each) of lighting in the kitchen for 4 x 36W fluorescent tubes and 6 x 60W candle bulbs with 6 x 11W cfls in the lounge. I have a portable energy meter so I can walk round...

I bought my PC about a year ago . It contains an AMD Athlon 64 3200+,bus 2200Mhz, 1024kb ram, 204Gb Maxtor HD and NEC RW ND3540A DVD. I loaded Itunes just after I bought it and over a period, loaded CDs on to it usually 6 or 8 one after the other without a problem. A few weeks ago, after...

The problem is that hot water circulates in both water and CH regarding of the controller setting. I removed the electrical part of the V4073A and whatever the position I manually set the shaft to it still circulates in both circuits. Previously on another system I was able to change the head...

I have a 10 year old Bosch dishwasher which now takes approx 20 minutes to fill. You can hear the water dribbling in very slowly, and even the shortest wash cycle takes about 3-4 hours. I have checked the water pressure and I took out the inlet valve and dismantled it but I can't see anything...

I have just installed a new Grant Vortex 26kW condensing kitchen model (not system type) oil boiler and it does not light. The fan starts and after about 15 seconds there is a humming which I assume is the ignition sequence which lasts for about 3-4 seconds and then the burner lockout neon...

The first job I did when I moved into my current house a mere 17 years ago was to rip out the old suite from the downstairs bathroom and replace it with a shiny new one. Now my wife says it looks old fashioned and it has to go. There is absolutely nothing wrong with it! It occurs to me that...

I apologise in advance as I expect this question has been asked before but I tried searching and I could not find it. I need to couple 22mm to 3/4 pipe. I have just used my last 3/4 inch olives and I can't get any more quickly. Can I solder 22mm Yorkshire fittings to 3/4 inch pipe, perhaps...

I calculated my radiator sizes (BTUs) based on the simple formula of room cubic capacity in feet x 5 for lounges and times 4 for bedrooms -adding 10% for windows etc, etc. I was quite happy until I read about the Kermi radiator calculator in this forum. It is a much more sophisticated...

I want to replace some old single and double steel radiators. These rads have no fins and I would like to know what is the relative efficiency of modern finned single and double rads. In other words how much smaller would a finned radiator have to be compared to an unfinned one for the same heat...

I need to replace an old oil boiler with a new one (fairly large detached house). I have a single pipe system so I am not going to fit a condensing boiler. Are there any particular boilers that are better than others?

I live in a 4 bed detached house (1935) which has an ancient Potterton oil boiler (it looks about 40 years old at least). This wonderful old boiler has given me good service for the last 15 years but last winter's oil cost was around 1000 pounds and this seems much too high to me. Also on any...