central heating

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  1. S

    Boiler & 2 port valve problem

    Hi, I have just had a problem last night with my h/w & central heating system, I have found out the boiler has been stopping and starting without the c/h 2 port valve opening, I have tested the circuit and discovered it is the micro switch in the valve that must have stuck in the closed position...
  2. the pict

    Pump on or is it

    Grant Pro external combi I have just nipped across from the sparky forum and hoping for some advice, the boiler stopped working this morning however, long story short I have never had the burner out in the 3 years since it was installed and the prongs were coated in black crud a quick clean and...
  3. G

    Electric Fusion Boiler Repair or Replacement

    Hi, I have a 1st floor duplex flat and upstairs in the boiler room is an Electric Fusion Boiler with hot water cylinder tank. The hot water tank is working fine for the water but the boiler / central heating system which is a bit of a beast, (installed in 2006 image attached), is now faulty...
  4. B

    Issue with Keston C36

    I have a Keston C36 Combi boiler. Stuck in heating mode. I have changed the diverter motor as not moving to transfer across. This didn’t fix the issue. I’ve now changed the capacitor that drives the motor. Again nothing changed. Any ideas on what else it could be?
  5. littlespark

    Possible fault with motorized valve

    I've been phoned by a customer who says his central heating pump is running almost constantly, whether his heating is on or not. (oil fired Worcester system boiler) Its not my usual area of expertise, but im thinking its possibly the motorised valve sticking and not releasing the switch that...
  6. K

    No Central Heating please help

    I am not any techie in anyway, just stumbled across this forum. I have a BG UP2 controller. The hot water is working fine. This morning I wanted to switch the heating on, outside of the normal hours. The arrow will not move from the off position. Would anyone suggest a new controller, or...
  7. sythai

    Chaffoteaux Britony Combi SE 100

    Evening Guys Anyone have experience of this Combi: Chaffoteaux Britony Combi SE 100 My mates got one in his temporary caravan with dodgy time clock, was hoping to bypass this and control via an external stat. No stat currently fitted. Can’t find any wiring diagrams online? Not seen boiler...
  8. O

    flexicom 24cx has Hot Water but no Central Heating

    my flexicom 24cx has Hot Water but no Central Heating. the problem seem to be the analogue switch selector. it looks as if it is stuck on the off position and won't move to the timer or on position. Is it that I do not know how to move it??
  9. Midwest

    Nest in a bedroom

    In my property, I have an S Plan Plus CH system. The first floor zone is controlled via a low voltage programmable thermostat. The stat is made by Danfoss, and is quite frankly rubbish and needs replacing. The current position of the existing stat, is in the main bedroom which doesn’t have...
  10. S

    Salus, running boiler most of the time.

    I have a salus RT501RF (TX) and the thermostat is Salus RXBC605. The boiler is a baxi duo tec 24 combi erp ( what the label says). I have reset the boiler, thermo and wireless unit, synced them back up due to the same issue but it did not fix it. The problem is the boiler is running all the...
  11. EricMark

    Energenie TRV heads not following Nest.

    Seems intermittent, some times as it should when the Nest thermostat changes temperature the 4 linked TRV heads change with it, but some times they don't alter, not an issue when temperature is dropped but it is an issue when temperature is raised as the pump is sucking on closed valves. Easy...
  12. I

    Thermostat stopped clicking/no central heating

    Hi guys, Had Baxi round to do a service, and immediately after the central heating wasn’t turning on (hot water is fine). Had them back out and they said the boiler is fine, it must be a faulty thermostat. Replaced the thermostat today, and still nothing. When I connect the live and call...
  13. B

    No zone valves on my system

    I have oil heat with 3 zones/3 thermostats (basement, 1st/2nd floor) using baseboards. The 3 thermostats are 110v line voltage units that operate the 3 circulator pumps. There are no zone valves on this system. I would like to install 3 Nest thermostats to replace these old line voltage units...
  14. rolyberkin

    Boiler not firing

    Hi all, just a bit of self-doubt here, have wired in a Worcester Bosch Greenstar ri boiler with three two port valves which feed HW, Rads and one underfloor heating circuit. The boiler hower is not firing although clearly has power to it. When the time clock calls for heat there is power at the...
  15. S

    Wireless room thermostat query

    Hi guys. Just bought a Honeywell CM700 series wireless room stat/programmer with BDR91 relay box/receiver to link with Worcester Bosch 28CDi combi boiler. Using a 4-core will take L/N feed from boiler to L/N in receiver and route the Ls/T1-A and Lr/T2-B. But there are 2 L terminals in the...
  16. rolyberkin

    Two Zone Controller Suggestions

    I have a heating system which I need to buy a controller and thermostats for, will have 2 x two port valves, 1 zone will be rads and the other a single underfloor zone with independent pump, and hot water, was thinking about a Heatmiser UH4 with 2 wired thermostats? Any other or better...
  17. S

    Wiring to replace old room thermostat to new digital

    I’m replacing a tatty old mechanical Drayton room thermostat with a sleek digital Flomasta 7635G. Could a wise wizard please help decipher the code known as the wiring diagram in the pictures attached. Theoretically, given the ‘standard’ wallplate, I should just remove the old and pop on the...
  18. J

    Changing salus receiver to hive

    Hi i need to change my old salus receiver to my new hive one and im not sure about the wiring do i put it all the wires in the same places on the hive receiver? The picture is the wiring into the old receiver
  19. C

    Warm flow oil boiler

    Hello, so this is to anyone that is great with heating systems. It’s always been a weak point for myself. I am currently doing a heating system at a home which has a warm flow oil boiler. I’ve been told it has 4 zone valves 1-UFH 2-Upstairs radiators 3-Towel radiators 4-Hot water It will...
  20. D

    Evohome boiler interlock

    Hello, I have an Honeywell evohome sytsem at my house. I have 6 valve TRV's installed on the radiators and 2 radiators that currently do not have any valves until i change them. The relay box has been installed attached to the boiler and can be turned on and off via my phone and the evotouch...

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