No heating demand from external controls. Jul 22, 2009 · C/H isn't coming on - boiler status is 'S.
No heating demand from external controls Boiler is less than 18 months old. 30' (no heating demand from external controls - clamp 3-4 open). Set the heating temperature to the maximum setting. If you take the cover off the receiver under the boiler, then tell me what colour wires are connected to each connection then I should be able to give you heating in about 5 minutes. 31 Central heating thermostat knob turned off or no heat demand by the eBUS control unit S. 30 (No heating demand from external controls) The thermostat is clicking on when it should but the bolier doesn't respond. 30 No heating demand from external controls (clamp 3-4 open) this is what manual says reading the manual it seems that boiler is designed to use an ebus control, although 24 volt and 230 volt options are also Hi, an S30 status code on your Vaillant ecoTEC Plus boiler means that there is no heating demand from the external controls, such as your thermostat. Airlocks can prevent hot water from circulating through your radiators, which means you won’t get any heat. The time on the timer corresponds to the controller. 2. 30 (No heating demand from external controls, clamp 3/4 open) despite everything looking OK on the app and despite a boost being used which again looked OK on the app. 32 Heat exchanger antifreeze active, as fan speed variation is too high. 32. 32: Heat exchanger antifreeze active as fan speed variation is too high: S. Another common reason for no heating is airlocks in the system. When loop testing for commisioning, fuse in spur blew. Control. Appliance is within the waiting time of the operation block function: S. 30), when you press (i) it provides up the status such as "over run" when cooling down after no longer receiving a demand for heat, or in your case when idle advising "No heating demand from external controls (clamp 3-4 open)" As such this is correct as you have no heading demand, it will change when you turn on your Dec 29, 2015 · However, while the hot water is working fine, the heating no longer works. 31. I've also tried turning the whole boiler off at the mains and then back on again but it makes no difference. 42 Feb 19, 2010 · C/H isn't coming on - boiler status is 'S. I dont know how to create a heating demand. Meaning: This means that your Flow NTC (Negative Temperature Coefficient Thermistor) cable is either defective or broken and needs to be replaced Sep 25, 2022 · etc include year of manufacture, I am no expert and if you provide more info one might respond. There's a HW stat on the tank. To troubleshoot this issue, you can try the following steps:• Check the Feb 11, 2023 · No heating demand from external controls (clamp 3-4 open) S. Anti-frost mode is active. 36 No heating demand from external controls: S. May 20, 2009 · My Vaillant ecotech boiler is telling me S. 30 which means "No heating demand from external controls (clamp 3-4 open)". 37: Fan Unit Waiting Period: S. 23 Most field studies of heat pumps Oct 1, 2005 · Chris, my appologies for being such a plum my boiler is infact as you state the turbomax plus (not pro as I previously stated). Check that the external control display is calling for heat. I initially thought the room stat directly controlled the boiler but as it seems the room stat moves the 3 port valve to heating position and then inside the valve head there is a microswitch that is 'made' on heating demand and it is this microswitch that tells the boiler to fire for heating, I'll give the TPV a bit more I have verified that when a zone calls for heat the EA1 DE1 input is listed as supplying demand and the circulator pump shows as ON, and it is, again, ON, so all seems to be working perfectly. 08 (External controls heat demand) changes from 0 (0=open no demand) to 1 when stat turned on (1=closed demand). It sounds like you have done most things to get it working and still have a problem with the receiver. I have found that I have the code S30- 'No heating demand from external controls 240v'. I've tried turning the radiator switch to 'on' constantly, turning up the heating temperature, and I've checked the pressure - it's 1. 36: Not heating demand form low voltage: S. 34: Frost Proctection Mode: S. Jul 22, 2009 · C/H isn't coming on - boiler status is 'S. The hot water is ok but can't get the heating to work. Jan 1, 2021 · But showing a fault code does not seem to say thermostat failed to call for heat, that would normally not be considered as a fault. Strangely my app was boosting my hot water however so there must have been some communication between the receiver and the boiler. This is the boiler temperature with external demand. Thermostat knob is set to off. 9 bar: S. 42 Dec 30, 2024 · Unfortunately I can't get the heating to turn on, but the hot water seems to run fine. Power Heat Demand Setpoint Demand WWSD Pump Stage 1 Stage 3 Stage 2 Stage 4 UnOcc. Like Marc says - S30 is the status code for no demand. However, I can get the CH to work by pushing both the + and - buttons together which I'm told puts it in some chimney sweep mode, although I have only let it run in this mode for a few minutes the radiators Jan 9, 2009 · S. I have linked out 3-4 but still the same. 30 No heating demand from external controls S. Minimum Power Heat Demand Setpoint Demand WWSD Pump Stage 1 Stage 3 Stage 2 Stage 4 Minimum With Heat demand signal The "Heat Demand" light will come on, the control will switch on the system pump and calculate the desired Aug 27, 2010 · Have checked the Diagnostic Menu - the code d8 - "external controls heat demand" (which I assume means room stat in my case) d8 shows a status of 0 when I believe it should be 1. 8 bar. The 3 way valve moves to Water demand when requested, but when in Heating mode, I only get ~37V on the the white cable to CH1 Live. 53: Delay Mode due to lack of water in system: 20 mins: S. Unoccupied dials are not functional. Hot water works fine - full gas rate mode for commisioning also seems to work. Oct 29, 2009 · Hi guys, We have a Valliant Eco Tec Pro with a Danfoss TP5000 thermostat, the other day the heating was constantly on so my GF turned the boiler off when she went to work, since turning it back on we have hot water but no central heating, when I press the 'i' button it gives me the diagnosis Aug 3, 2023 · A guide to boiler controls to ensure your heating is switched on. S. This could be due to a faulty or disconnected thermostat, a broken wire, or a problem with the boiler's control knob. 31: Central heating thermostat knob turned off: S. 30 No heating demand from external controls (clamp 3-4 open) S. 22 In some cases, the demand reduction is preceded by a period of increased power to pre-heat, charging the thermal mass of the building and increasing the internal air temperature. Any advice would be appreciated. No clicking. Airlocks. There is no user adjustable thermostat on the boiler, and anyway if there is one on the internals which I do not believe there is, then that hasnt been changed or adjusted either. 5 BAR. Water pressure is 2. 32: Fan Unit Waiting Period: S. . Heat exchanger antifreeze active due to high fan speed variation. Oct 8, 2018 · The room thermo is solid state electronic. Jan 15, 2011 · The status of the CH demand (i+-) (d08) is always zero and if i push 'i' i get 's30' code that means no ch demand from external controls. But I turned both the tank and room thermostats down - no difference. The one thing I'm not clear on is the setting in coding location 9B. Nov 5, 2021 · I have the symbols for hot water, heating and timer on the display, and have also tried with just hot water and heating. Mar 29, 2016 · It's not a boiler fault as if there was demand for heating there would be a C in the display. 36: No Heating Demand from Low Voltage Controls: S. 41: Water pressure greater than 2. Hi I am Rick, UK Plumber, and I specialize on Boiler problems,S30 means no demand is being made for heating, so your wireless controller is not sending a demand signal to the boiler, follow the user instructions re resetting the controller but many times these units just fail to communicate, Rick Sep 10, 2024 · No heating demand from external controls. Ensure that the boiler is full of water and charged to 1-1. 30 is a status code (S. No Heating Demand from External Controls: S. We last had it on in May and worked fine and the water is heating up as normal when the hot water tap goes on but when we put have tried to put on the heating, it wont work and won't fire up. 34: Anti-frost mode is active: S. Ensure main on/off control is set to ‘on’ Temperature. 5. There are no fault codes and the status code is S. Does this just refer to the radiators or does it include hot water. You could bridge out the external controls inside the boiler at the terminal strip but as the combustion case has to come off for that I'm afraid you can't do that. 31: Central heating thermostat knob turned off or no heat demand by the eBUS control unit: S. 54: Low Level Water Waiting Period Filling the Heating system. If it were my boiler I'd make sure at least one radiator is fully open and thermostat is selected high like 23*C; if I had external controls, after isolating the electrical power to the boiler, If my boiler looked like picture I might disconnect their wires at the connecting block #s 3 & 4 and Sep 22, 2015 · However i dont think the ecotec does anything at the moment. Central heating thermostat knob turned off. I am getting a S30 No heat demand Controller status, but the thermostat is set higher than the room temperature. 5 so should be fine. 34. Dec 29, 2015 · In the OP, you say you have turned up the heating temperature; did you mean the temperature control on the boiler or the thermostat mounted on a wall somewhere? Is your thermostat mechanical/analogue, digital (battery powered) or wireless? If you have a code S30 and no other fault codes, I would tend to believe that there is no heating demand. Theres a picture of a hot water icon on it but on pressing "i" the code is 5. Anti-freeze mode activated due to fan speed variation. No heating demand detected from external controls. The boiler in diagnostic mode d. reading to many posts for answers I think going slightly mad. Dec 13, 2022 · Demand can be reduced during those periods either manually or automatically, and either by the householder or an external party. 32: Heat exchanger antifreeze active, as fan speed variation is too high. External Controls. 39: Contact Thermostat has been activated: Under Floor Systems: S. My feeling is that Nov 1, 2022 · No heating demand from external controls: S. Jan 17, 2016 · Yes - having read around a bit more I'm starting to think that way. 34: Antifrost mode active: S. Anti-frost Oct 21, 2014 · I have an ecotec pro 831 with no heating. Sep 21, 2010 · Since we had that work done, it has worked perfectly but for some reason the boiler will not fire up when we want the heating on. vpmmncklstuvuicqphlsmzwxvachozciruzjdrwgvmbplaaq