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Yes, discard and renew the defective burner. Many of these older boilers caused water droplets dripping from a specific point of the heat exchanger on initial first cold start up caused by condense of the flame on the cold serface but disappears after warm up. A visual check when boiler...

@ John Brown re:- "Just wanted to understand a bit more behind the reason the flames are the way they are" ........................ The two burners are identical at manufacture but the R/H one has a pilot bracket fixed and is therefore more expensive. This style of burner were made by...

Indeed it is a dual element temperature controlled dual stat, as the control stat reaches cut-off temp it switches over to the overrun stat and in effect continues to run the pump until the factory set cool down temp is reached then pump switches off - but there is one main difference on...

Hi jtbolton, Your auto bypass valve appears to be ineffective to requirements. They often are diagnosed as 'stuck' and need to be cleaned of deposits and re-adjusted, many are set by pure guesswork. The 'screwdriver-to-the-ear' test always works best for me:- a: No flow sound = shut b: High...

Ammonia type smells invariably come from the products of combustion most notably *incomplete combustion* cause by various deficiencies eg: flame impingement, ghosting, flame lift-off, poor primary combustion air etc etc. The onion type smell particularly is caused by the formation of aldehydes...

Good to know your boiler is working again. Are the pipes feeding the cold rad, hot warm or cold? - has the cold rad worked recently? Physically check both rad valves are open and operating (check the valve head pin is not stuck down if a TRV) if all seems o.k trace the run of those two pipes...

Indeed, both taps are in the open position, however, in place of a flexible filling 'loop' there is on your boiler a permanent fixed filling adaptor which has its own valve (the one nearest to the front) and is currently in the off position. Give it a quarter of a turn to fill to desired...

Nope, not "prohibited" - common sense must be defined and applied. The gas safety regulations infer and explain that if a H&S executive confirms that the safe use and function of a gas appliance is not compromised then the appliance is deemed 'safe to use' with no applied deteriment to the gas...

Dan is correct, some of the better designed stats can function in several modes. Implementing 'predictive set back' can work in conjunction with (or compliment) 'start up anticipation' - this means the stats self learning ability will work in both high (normal)and low (set back) modes - - - in...

Ideal would normally only verify their boiler is working o.k - the system pipework and associated equipment needs a thorough check over by a fully experienced skilled tradeserson.

There is only one thing that comes to mind regarding the splurting water from the taps which then settles down only to repeat later - "The combi pressure vessel is somehow involved"

The overheat/limit stat wired through the thermocouple interrupter has tripped and must be replaced which will then give coninuity to the valve. Of course work to be done only by qualified and registered persons. Regards

@ ron56 Out of curiosity, could you check that the small lever on the 3 port valve head is actually set in the auto position and not in the manual position which, if it was, would contribute towards the symptoms described. regards

Cleaner is the prep' bond agent before applying the cement (glue) - the cleaner 'burns' into the plastic first then quickly while still tacky apply the cement and push fit the joint parts together. You can pull apart some joints that have been 'glued only' whereas a joint with cleaner then glue...

Some further checks to make... There is a bypass branch between the pump and 3 port valve, locate a valve on this pipe and check if it is open or closed. This valve must be set for a minimum water flow of 9 litres/min through the boiler ideally via 4 metres of 22mm pipe between flow and return...

The boiler has an integral bypass valve and no alternative valve is required in the system. The boiler has its own pump overrun incorporated, runs and spin checks automatically. Just wire the H/W and C/H zone valves respectively to required controls as per the manual, it's all standard install...

As the two zone valves close, with the pump still running the increased pressure will open the AB valve but then it will close after the overrun period, so an AB valve constantly allowing flow is highly likely to be stuck or non responsive, check it out, a new valve might be the answer unless...

@ Patrick Hutchinson, For your system to function correctly the following conditions must be met... 1. Ensure the pump overrun is enabled and wired correctly at the boiler. 2. Ensure that when both zone valves are closed the pump continues to run for a short time ('pump overrun') - this will...

These products have a lifetime guarantee, have you contacted customer care at Aqua glass about the problem? they might be able to supply the part only? http://www.aquaglass.com/customer-care/contact-us.html

Everyone will have smart meters (gas & electric) fitted free by 2020, just wait a while. They will have remote controls with 'at-a-glance' bill balance updated every 10 seconds. http://www.theguardian.com/environment/2009/may/11/smart-meters-energy-efficiency