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Potterton heatmax 24 boiler, hot water changes from hot to cold constantly

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

gary1121
  • 332 Answers

SOURCE: 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

Posted on May 29, 2009

  • 104 Answers

SOURCE: changing boiler programmer

take digital pictures - label all wires and reconnect - you do not need manual.

Posted on Oct 31, 2008

  • 1 Answer

SOURCE: Combi Boiler - Running warm & then cold!? HELP!

the problem was solved on my system by replacing thermostatic valve on shower and putting non return valves on hot and cold feed to shower . the problem was caused by cold water getting into the hot water line through the shower hope this helps

Posted on Dec 30, 2008

gasman44
  • 83 Answers

SOURCE: my thermostatic concealed shower valve only gives

Hi,

If the hot and cold are fitted the wrong way round then the thermostat on the shower unit cannot operate properly!

Most thermostatic mixer showers have a 'bi-metallic' thermostat, if you supply the hot to the cold and vice versa IT WILL NOT WORK.

It is like wearing the left shoe on the right foot and the right on the left! It doesn't work.

Re-install the hot and cold to the correct supply, and this will sort it.

I hope this helps.

Posted on Jul 08, 2009

mrhotandcold
  • 248 Answers

SOURCE: how do I reset/restart my Potterton performer 24 boiler

flow switch not working, heating thermostat faulty,best of luck

Posted on Oct 12, 2009

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1 Answer

I have a Potterton Combi Puma 80e When I use the shower the pressure seems to drop and shower goes cold! except when the central heating is on shower works fine


Does the red status led in the centre of the control board come on when hot water is drawn? You need to remove ONLY the front decorative cover to see the control board, two fixing screws at the base of it. If not the boiler won't fire when the CH is off.
The trigger for this is a pressure switch, replacement of which is beyond DIY scope.
FYV

Feb 11, 2013 | 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

Puma 80 potterton hot water on and off


Boiler compartment ventilation will not stop you getting hot water . Its sounds like you have problems with a sensor or the water section on the boiler .

Apr 20, 2017 | Water Heaters

2 Answers

Potterton Profile 60e doesn't start first time


could be fan speed or air pressure switch-is case seal sealing properly also check grommets under boiler for blowing.
YOU CAN ONLY WORK ON BOILER IF YOU ARE GAS SAFE REGISTERED.

Apr 04, 2009 | Water Heaters

2 Answers

Combi boiler problem


most have an overrun built in for a few minutes. if much longer have you got a room thermostat anywhere to turn down
If it never turns off check the switch which controls ON/TIMED/OFF and turn to timed or off. if it still continues on timed then it's the timer

Jan 22, 2009 | Whirlpool Aquatic Millennium VII -...

1 Answer

Changing boiler programmer


take digital pictures - label all wires and reconnect - you do not need manual.

Oct 27, 2008 | Water Heaters

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