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Hello, First off I'm not a plumber, just felt I might have something to offer the thread. We had a similar scenario albeit with a fairly modern boiler (radiators, pipework much older), everything worked fine however I was constantly bleeding a radiator full of air every week or so. It was...

Update: I removed and cleaned the thermocouple, the end (bit that goes in the flame) looked well oxidized. After a minute with some wet and dry paper I replaced it and now the boiler is firing up just fine. @fazedup71, thanks for the information regarding the reading the thermocouple should...

I have a Ravenheat RSF820/20T combination boiler which has stopped firing up on both hot water and central heating demands. This happened before many years ago and in this instance it was a small blockage in the pipe leading from the main fan unit to a microswitch which clicks in when high...

Thank you. The diverter valve we had replaced some 6 years ago when it got stuck and we had only hot water or heating (can't remember which). Do these valves have a fairly short life expectancy ? I will need to read up about Hot Water Diaphragm as this part I am not familiar with. Many...

A problem has developed with the on demand hot water with my Ravenheat RSF820/20 Combi boiler. This evening I noticed that when I turn on the hot tap, in order to fire up the boiler I need to turn it on full. Normally (up till this evening) the hot tap only needed to be partially open to fire...

My Bosch Classixx (cold feed only) Dishwasher has been causing a water hammer effect for some time now. No other appliances / taps cause this effect. My understanding is that the solenoid valve is able to shut off the supply very quickly (much quicker than you would be able to turn off a tap...

Thank you. Makes alot of sense. And yes I have no intention of interfering with it. Would be interesting to know however what the symptoms would be if it were faulty. Reason for asking was when I examined the boiler schematic there seemed to be no reference to it. Even now I'm struggling to...

Would someone be kind enough to identify the spherical part in the photo of my Ravenheat boiler (and its purpose). And from another angle My thanks in advance.

Mailed. :D

Many years ago I aquired the engineers manual (PDF format) for this boiler. To date I have managed to resolve all issues I have had with my Ravenheat RSF 820/20 (one very recently) using the manual and in part this excellent forum. You are very welcome to a copy if you care to post your eMail...

Good point Agile, my fault, fairly new to forum posts here. Have left you a thanks for the information you left me on the previous posts regarding life of central heating pumps. Never have guessed they could last in excess of 30 years if the system is kept clean. So keeping your system sludge...

Great, have also eMailed it (with a thank you) to glasgowgas. Hope you find it useful. Fancy a vodka myself after all this... Thanked both glasgowgas & kevplumb for your forum posts using the button.

Engineers & User Manual eMailed to you as requested 'kevplumb' :lol: :lol: :lol:

Thx glasgowgas , basically figured it out 2 minutes before you posted (with the help of a schematic from the engineers manual) but thank you very much for taking the time to replay. To think I was considering buying a new pump............

Hi again, OK no need to reply I have fixed it. I shorted wires 3 & 5 going to the timer and it central heating kicked in. So it's the cheap eBay timer at fault (that appears to be working fine). Phew..... Were you serious about the engineers manual 'kevplumb' as I have it on PDF and will...

Hello again, This is a follow on post from my original post earlier today. http://www.diynot.com/forums/viewtopic.php?t=194239 It read: *** START*** I have a Ravenheat RSF 820/20 combi boiler (15+ years old) which has developed a problem. I was made only aware of it today as it's the...