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Why is there no power coming from boiler thermostat to three way valve .. Baxi Boiler

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Check and verify the transformer that supplies the correct voltage is working.

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1 Answer

Baxi boiler no water in hot water taps


If no hot water it is the diverter valve in the boiler. If no cold water the tap in the mains water supply to the boiler may be turned off

Apr 19, 2014 | Water Heaters

1 Answer

Wickes 102 combi boiler constantly loosing water pressure


It sounds like your thermostat could be the problem. Have you noticed the boiler cutting off at all, or does it run continuously until it goes out on low water?

You stated, "when boiler is on", so I am wondering how you get the boiler on. If your boiler is controlled by a thermostat, you need to check it for a cold draft possibly from behind the thermostat in the wall where the wires come through. The thermostat should never be on an outside wall. The thermostat could be defective.

An aquastat can also control your boiler. If you have an aquastat, check the setting, typically 175 - 180 degrees. You should also have a "high limit" which should be set at 210 - 220. Some people run that high side limit higher; not a good idea - defeats the purpose. If the aquastat is set too high, the boiler will operate too hot and the problem you have will occur.

"pressure rises and pressure relief valve opens" This could mean that your pressure switch is prematurely venting. Check boiler temperature to see exactly at what temperature the T&P valve purges. If it blows off below the high side setting, either adjust or replace. The T&P valves are usually not adjustable. That blow off temperature is stamped on the head of the valve. So, if it discharges too soon, replace it.

Have you actually seen evidence thgat the T&P valve is opening? You may have a bad bladder in your expansion tank and your system may have air in it. Your boiler should have 12 psi when cold and 20 - 22 psi when operating. Check your boiler pressure guage.

"
this eventually drops below the minimum operating pressure" Technically, there is set point for a NO MINIMUM OPERATING PRESSURE. That is a function of the amount of water in the boiler. If the T&P is blowing off, it will vent water from the boiler and the boiler pressure will go down. There is a minimum operating TEMPERATURE.

Your boiler could be low on water. You will have to manually fill the boiler. Be careful of thermal shock to the boiler. Feel the piping, and fill only when the circulator is running. Make sure the water is not going directly into the boiler. The supply water should go into the circulating supply side which feeds the radiators, radiant floor, or base board circuits.

All this will adversely affect your hot water. The heat exchanger for the potable hot water may have scale build up in it. Using the hot water keeps the boiler running, and a scaled heat exchanger will give you cooler hot water and the boiler keeps running. If this is a problem, you will need to replace the heat exchanger. A better idea is to not use the boiler for your domestic hot water. Why run the boiler in the summer?

Feb 02, 2013 | Water Heaters

1 Answer

Baxi boiler 80E low pressure on boiler how to fix it?


Silver flex hose may be the (correct) filling loop. There may be a valve at each end of it, maybe just one at one end.
Open the single valve slowly and LISTEN for the sound of water entering the system, and LOOK for signs of the pressure gauge rising.
On the dual valve version open the first, then open the second slowly as above. Close both valves when pressure is adequate. Adequate is determined by the specifics of your system, but note that more pressure DOES NOT mean better showers, etc.
It should only take a few seconds to top-up, any longer indicates a significant loss of fluid from the system.

Jan 28, 2013 | Water Heaters

1 Answer

I have a Baxi WM old boiler. Hot water only needed


there should be a switch which toggles between hot water only /// hot water + central heating /// & possible off on
Either on the boiler or on a separate timer control

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1 Answer

Boiler coming on,on its own


Sounds likely. But check the timer selector switching [on/off/24hrs] & if you have a room thermostat wired in

Jun 13, 2009 | Protech Systems FasNSeal FSWMKE4 4" Vent...

4 Answers

Baxi solo 2 30pf will not fire up.. please help!


first off ensure water is getting to boiler, next, No pilot = pressure switch. On my baxi solo 40 pf pressure switch is replaced 8-10 times a year cures your problems,,,,,,,, momentarily , and have had all your other parts,but with no effect to speak of,.......sorry............ solution = [ change boiler ].sounds like gas pressure or lack of water to system or **** boiler like mine .........good luck.

May 15, 2009 | Water Heaters

1 Answer

Re: combi boiler.


if you have hot water at the taps but the heating isn't working make sure the thermostat is set high enough for the boiler to run check the time clock settings are on.
if these are working it could be a faulty diverter valve switch not sending a signal to the boiler to run.

Mar 23, 2009 | Water Heaters

1 Answer

Manual for Baxi Boiler


any merchant will get one mailed out to you

Jan 24, 2009 | Water Heaters

4 Answers

Baxi combi boiler 80e safty thermostat light on


baxi boiler relief valve blows off when heat is turned on when hot water is working it is fine

Oct 15, 2008 | Protech Systems FasNSeal FSWMKE4 4" Vent...

1 Answer

Boiler overheating


the problem there a relay stuck or thermostat bring on the pump & you can lower your high limit aquastat!! also the flow valves can bypass hot hot water risers time to put in a seperate water heater domestic coil are not energy efficient !!!! aquastat high limit set @ 180f deg low limit set @ 140f deg!!!
good luck!!! tim

Oct 08, 2008 | Water Heaters

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