Tip & How-To about Amtrol Water Heaters


So you get an E-3 error and nothing you seem to do corrects the issues, I had this happen to me once and what I found is that my boiler system side was working perfectly but the water heater took forever to recover and get up to temp causing alarms. What I did was take my Delta T across the heat exchanger and found that it was only 10'F meaning that the conductivity in my system was very poor. I decided to remove the heat exchanger from the boiler mate and found that the exchanger had sediment build-up almost 2 " think. Now imagine this, say you have a bucket of water and you throw a 300'F piece of metal into the water, naturally heat conduction causes the original water temp to rise Now say we take the same piece of metal @ 300'F and wrap it in a blanket, now the temp giving off 300'F originally is more like 90'F with the blanket over it. Throw the metal wrapped in a blanked into a bucket of water. Now ask yourself which will heat the bucket of water up quicker? Obviously supplying 300'F to the bucket of water will heat water up faster than supplying 90'F. this is exactly the concept of a fowled heat exchanger. You want to get rid of sediment (blanket) on the heat exchanger to make the system heat up faster and require less energy to get that water to a certain setpoint

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Ferroli boiler error code A3

boilers need a certain amount of water pressure to operate as specified--there may be a pressure regulator valve, allowing a certain amount of water to your boiler, and when water is drawn elsewhere, there may not be enough getting to the boiler---this is one possible solution, but there are easily 20 more, and that is where a trusted plumber is worth it's gold...very difficult to diagnose most plumbing problems without being onsite

Mar 03, 2010 | Water Heaters

1 Answer

i have an ideal standard he30 boiler instaled about 6 weeks ago. the boiler keeps losing presure about half a bar every 2 days if i dont top it up it will trip the fuse on the fuse board acording to the ideal instruction manual it should put up a fault code and not fire up. i have had the instaler out about 6 times and they say there must be a leak but nothing obviouse. but the boiler is fine. so i asked why it trips the fuse when the presure is low. the reply was that the boiler keeps fireing even if the presure is low and overheats the pump which trips the fuse. i said that isnt what the manufacters instructions said and i was told this is normal for these boilers. is this true evan if the instructions say other wise?

All the combis I've come across merely fail to fire if the pressure is not up. not only do they not fire, nothing else works including the pump and in any event the pump should not overheat just on low pressure.
water loss - try turning off the valves on the flow & return pipes [3/4 inch ones] 1 valve per pipe . This will isolate the rest of the system - rads etc Note pressure over a time period. In this mode the hot water circuit will still work but do NOT use the heating circuit
1/2 bar over 2 days is not serious but it should be found
Once you have either mended the leak in the rest of the system or found there is not one, insist on a replacement boiler
In any event having looked at the reasons given for the fuse blowing, I would definitely get a replacement.
These problems should not happen on a new boiler
I list Worcester.-Ariston-GlowWorm-Ideal- and many others who would confirm this

Dec 24, 2009 | Water Heaters

1 Answer

a trickle of hot water from taps, central heating ok

it sounds like your shut off valve might be bad even though it turns on and off by turing it doesn't mean that the washer is not stuck to the seat and not opening, try replacing the valve

May 18, 2009 | Water Heaters

1 Answer

brand new valiant condensing boiler installed will not work

Valliant boilers have software that can be used to diagnose the unit. The software can be purchased at the plumbing supply house that the boiler was purchased from. You can also get tech. service by email as well. It sound like there is an issue with the electrical controls with it. Or the controls were wired wrong.
Technical enquiries 01634 292392 or technical@vaillant.co.uk

Apr 01, 2009 | Water Heaters

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