HVAC Questions? Ask an HVAC Expert for Answers ASAP
Good evening, and welcome to the Technical section in JustAnswer, an independent paid question and answer platform that matches customers' questions to experts in various skills. My name is ***** ***** I'll be happy to help you today.So that I can give you accurate guidance, please let me know the exact model number of the boiler._____There's no time pressure on this topic - it will stay open to you for many days, and you can reply at any time. I will be away from my desk sometimes, but will respond as soon as I can.
OK thank you.When you press the Eco button, to switch to Eco mode, does the "eco" button light up green?
And when you release the Eco button does the green light stay on?
OK I need a bit more information to make sure I know which boiler you have, and also the programmer.On the rating label, somewhere on the boiler casing (probably underneath), there's a "G.C." number - please could you tell me that?Also, what's the make and model of your programmer or programmable thermostat?
OK please bear with me for a few minutes.
At the moment my conclusion is that there's a boiler fault. However, I'm going to think on this a bit further. I have an appointment at 8pm for one hour, so I will post again after 9pm.
You definitely don't have any other programmer in the house that might be connected to the boiler?
Are there any white boxes near the boiler, other than the receiver for the RFRP thermostat?
OK. Beat with me. I suspect that's an OpenTherm adapter, which could mean that the boiler Eco mode is being controlled by the thermostat.
Well, yes, ideally. I suspect it's defaulting to Pre-Heat mode.
Hm. Re-reading your initial post I see your point. You want to change to pre-heat.So, to recap, you're pressing the Eco button in order to turn off Eco mode?
Could you tell me a bit about the history of the installation? Was this installed for you, or did you inherit the system?
Hm OK. This is going to come down to whether or not that engineer used the OpenTherm interface to the boiler.The 1A-OT appears to be a receiver.. Is that the only white box near the boiler?
OK. My delayed meeting is starting so I will investigate after 9pm.
The slight difficulty I'm facing is not knowing whether the installer connected the receiver to the boiler using its OpenTherm interface, or just as an external thermostat. If I investigate both possibilities I won't know if I'm on a wild goose chase or if the boiler has a fault, or if there's an incompatibility with EHT's implementation of OpenTherm.So, it would be best to look at the electrical connection on the receiver. All you need to do is power off the heating system (or just the receiver) unmount the receiver from its backplate, and take a photo of the connections.
Yes - "Where?!" is a common question.Look for a SFCU next to the boiler, or a plain switch. Different installers have different styles. Failing that there might be a dedicated circuit from your consumer unit - if it's nicely labelled then have a look and see what's marked there. It ought to be a 6A MCB if it's a dedicated circuit.
Please see the following guidance on attaching photos:https://www.justanswer.com/help/how-do-i-send-photo-or-file-expert
OK. I'll create a Google Photos album and you should be able to drop it in there. Give me a few minutes.
You should be able to see this album and drop photos into it.https://photos.app.goo.gl/KQaex69eewxPD1eC8
OK. Bear with me for a moment...
Can you see the information at the following link?https://photos.app.goo.gl/cwumnpoRPKPkjqT78
Received. Give me a minute...
With the Eco light illuminated green, what happens if you press the Eco button for much less than 5 seconds? For example, for about 0.5 seconds.
OK. I have to conclude that there is something wrong with the pre-heat function.Since the boiler is so new, I'm sure that manufacturer's warranty will cover any fault. However, I recommend that you first contact the installer and ask them if they know if any reason why pre-heat mode can't be operated..
You're welcome Mike. Thank you for your rating and your kind bonus. Do you let me know how you get on with the installer - you can always come back to this topic if you have any follow up questions.Did you get the receiver back in place and the system on again?
Thank you for your rating, and your kind bonus. I'm glad that I could help.I hope you enjoyed your experience with JustAnswer.Have a wonderful week :-)