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My hot water light wont go out,my central heating wont come on either but I do have hot water

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  • 170 Answers

I'll need to know what make--model--- age of this unit is and if it's electronically controlled to help you----your question is too vague do to the enormous variety types of heating systems----I'm going under the info provided that this is a boiler with domestic hot water coil----you say central heating so this throws me off---do you heat with hot water--hydronic-----or forced hot air----if hydronic---it sounds like your circulator in not functioning----a bunch of reasons circulator has failed---aquastat's "circulator control" has failed---thermostat has failed----broken wires----plugged lines----it goes on and on----this is the best I can do with this info sorry Happy Rabbit

Posted on Apr 03, 2015

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Posted on Jan 02, 2017

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  • 70 Answers

SOURCE: The hot water and central heating wont work together

what size of gas line is going into boiler and water heater? is it black iron ? natural gas or propane? have you checked gas pressure at water heater and furnace ? if they work fine individually then you have a problem with incoming gas pressure. Call gas company and ask them if they would come out and check gas pressure.

Posted on Feb 09, 2009

  • 1 Answer

SOURCE: Siemens central heating control

I have a Siemens "Radio" Room Stat - the receiver has switched itself off. How do I restart it. I have pressed the restart button and the reset - nothing happens except for red light flashing and then off. I do not have the instructions. Where might I get them?
J W-K

Posted on May 01, 2009

  • 150 Answers

SOURCE: No central heating back boiler

back boiler run from a gas fire? check the instructions to operate the gas heat to the back boiler not just the fire
I presume that this a fully pumped system - air lock doubtful There maybe on/off valves on the pipes to and from the back boiler [situate close to cylinder] make sure they are on - anticlockwise turn
or there could be a blockage in the outlet from header tank usually in the loft. or If there is no water in it maybe the mains cold feed it is off.
Note if no water in it DO NOT USE the back boiler

Posted on May 03, 2009

gary1121
  • 332 Answers

SOURCE: Central heating and hot water have suddenly stopped working

not an engineer but maybe a heating compant,, it sounds like you have a relay that has gone bad, you have what we call a winter summer system your domestic water comes from a tank inside the boiler, you might want to think about splitting the system to save you some money in the long run, seperate the water heater from the boiler so you only heat up in the winter, right now you are heating the system that heats your house to get 30 or 40 gals of domestic hot water, it would cost you less by seperating them

Posted on May 30, 2009

gary1121
  • 332 Answers

SOURCE: vokera combi boiler

there is a zoneing valve thats suppose to be in the line to keep this from happening, might even have a check valve either way which ever one you have is bad and should be changed with a new one

Posted on Jun 06, 2009

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I have a Siemens "Radio" Room Stat - the receiver has switched itself off. How do I restart it. I have pressed the restart button and the reset - nothing happens except for red light flashing and then off. I do not have the instructions. Where might I get them?
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