Please can anyone answer 3 questions about central heating?

[dancinplumba]

Thanks again. That's the message I'm getting on this forum. If I was handy, I'd remove the TRVs (I know it's not that difficult to do, but I couldn't do it). I'll ask an engineer. Interesting that you say the noise isn't likely to be caused by the high temperature of the water. Appears I can discount that as a cause and go back to concentrating on air in the system and/or the TRVs.

take the head off the TRV's !!!

 

[Riley]

There have been several good ideas over three threads which have not been tried

 

[Harvest Fields]

Thank you. It's a combi system. I don't think the room stat is sending a signal. The room stat allows the temperature to drop by half a degree (it uses increments of half a degree) before it tells the boiler to come back on. Amazingly, in the time it takes the room stat to register that the temp has dropped by only half a degree, the house is freezing (the rads are stone cold). This can take over an hour (without heating so no wonder the house is cold). I wonder if the room stat just isn't registering the temperature drop quickly enough (it's just taking its time to drop) or if it should send the signal to the boiler much sooner. As you say, it doesn't seem right.

Where is the room thermostat stat located? And how far away is it from the nearest radiator?

 

[Harvest Fields]

Thanks again. That's the message I'm getting on this forum. If I was handy, I'd remove the TRVs (I know it's not that difficult to do, but I couldn't do it). I'll ask an engineer. Interesting that you say the noise isn't likely to be caused by the high temperature of the water. Appears I can discount that as a cause and go back to concentrating on air in the system and/or the TRVs.

Send a picture of the trvs and we will tell you how to unscrew the head from it on a temp
Basis.

 

[Martell]

Where is the room thermostat stat located? And how far away is it from the nearest radiator?

Thank you. The room stat is about 10 feet away from the nearest rad and about 7 feet off the floor. It's set 5 degrees higher than the actual room temperature.

 

[Riley]

Why won’t you remove the trv heads or move the stat

 

[Martell]

Send a picture of the trvs and we will tell you how to unscrew the head from it on a temp
Basis.

Thank you. Attached photo! I'm a female pensioner! If you tell me what to do, I'll be grateful but I might need help!

 

[Harvest Fields]

The bit that I have circled in the picture needs to be undone and then the head will come off the trv. They may only be finger tight but if you struggle to grip things you may needs some adjustable grips.

 

[Martell]

Why won’t you remove the trv heads or move the stat

I asked the engineer if the TRVs were causing the problem and he said they were ok. I'm going to try to remove the heads (I'm a female pensioner which is why I'm trying not to meddle too much myself but would rather get an engineer in to sort out the problem!). I have difficulty unscrewing parts that are tight. I tried to room stat in the hall and I didn't notice a difference, but I'll try relocating it again.

 

[Riley]

Sorry I wasn’t having a go but it had been said several times

 

[Martell]

The bit that I have circled in the picture needs to be undone and then the head will come off the trv. They may only be finger tight but if you struggle to grip things you may needs some adjustable grips.

View attachment 35462

Ok thank you very much. I'll try that tomorrow.

 

[dancinplumba]

Thank you. The room stat is about 10 feet away from the nearest rad and about 7 feet off the floor. It's set 5 degrees higher than the actual room temperature.

should be 4 ft

 

[Martell]

Sorry I wasn’t having a go but it had been said several times

No I know you're trying to help, but I've put all these suggestions to an engineer. He said draining and refilling the system wouldn't help, that he had no concern about the new TRVs that had been fitted, that I would need to keep bleeding the system as the noise was being caused by air, that the location of my room stat is not an issue. I do have faith in what he told me and he's offered to come back but it's taking too muc to solve the problem of the gushing sound in the pipes and rads but I wondered if I should be better informed or I'll just keep going over the same suggestions!

 

[Martell]

should be 4 ft

Ok thank you.

 

[Harvest Fields]

No I know you're trying to help, but I've put all these suggestions to an engineer. He said draining and refilling the system wouldn't help, that he had no concern about the new TRVs that had been fitted, that I would need to keep bleeding the system as the noise was being caused by air, that the location of my room stat is not an issue. I do have faith in what he told me and he's offered to come back but it's taking too muc to solve the problem of the gushing sound in the pipes and rads but I wondered if I should be better informed or I'll just keep going over the same suggestions!

The valves on the other end of the radiator may be restricted down to much. That causes noise.

 

[SimonG]

Open the trv head fully before you try and unscrew it. It can make it easier to remove.

 

[Martell]

The valves on the other end of the radiator may be restricted down to much. That causes noise.

Ok that's interesting. Would it be a gushing, coursing noise as if water is being forced through the rads and pipes? It's much worse if the boiler pressure is up to maximum. I've turned down the boiler pressure and eliminated the noise from the rads in my living room (still noisy in the hall and bathroom but they don't bother me). Trouble is, with the boiler pressure turned down, of course, the rads don't get so hot (ok for now but might not be ok when winter sets in).

 

[Martell]

Open the trv head fully before you try and unscrew it. It can make it easier to remove.

Cheers. Thanks very much.

 

[Riley]

Ok that's interesting. Would it be a gushing, coursing noise as if water is being forced through the rads and pipes? It's much worse if the boiler pressure is up to maximum. I've turned down the boiler pressure and eliminated the noise from the rads in my living room (still noisy in the hall and bathroom but they don't bother me). Trouble is, with the boiler pressure turned down, of course, the rads don't get so hot (ok for now but might not be ok when winter sets in).

How are you changing pressure??

 

[Martell]

How are you changing pressure??

Sorry perhaps I'm using the wrong words! The boiler has 2 dials with numbers, one for heating and one for hot water and the heating dial has been running at number 7 (maximum) so I turned it down to 5. I'm guessing this isn't pressure, then? It's temperature?