Underfloor heating not working

[diybrown]

Hi, was wondering if someone could help. I am a complete newbie to this so sorry for any terms that I get wrong and for this post not being very technical!

In my flat there are very basic electronic thermostats that I can adjust up and down (can't programme anything else). A few days ago it got colder so I turned them up to 22degrees...nothing has happened, all the floors are cold and the flat is just getting colder. I still have hot water so I'm sure the boiler is ok so I thought I'd take a look at the underfloor heating manifold...that's where I draw a blank and I can't find any information anywhere to tell me what to look for/adjust other than words I don't understand.

Anyways, here's a picture of the manifold and I hope some lovely person out there can help me in understanding what to try out to see if I can get the flat warm again

I'm not sure if this will help but here's a few things that don't come across in the photo/are hard to see:
The pipe to the right is warm until it reaches the straight bit going down (roughly where the pipe splits and to the left is the wheel thing)
The temperature guage on the left reads 20degrees and the right one roughly 18degrees.
The knobs that have the labels on are all warm.
I can hear the pumps running and the green one above is very hot.
All the other pipes are freezing cold.

I wonder if something has just jammed and isn't letting the water get into the pipes?

Thanks for reading View media item 67518

 

[JohnD]

is the pump hotter than the pipes going into it? If so it is jammed or dry.

 

[diybrown]

The green pump is absolutely roasting and the red one is cold. Someone in the neighbouring flat suggested it could be an air block or something? Is there anyway to fix this problem easily (i.e. a completely useless diy first timer like me could give it a go ) or do I need to phone in the plumber? Thanks so much for replying!!

 

[JohnD]

if you mean that the green pump is hotter than the pipes going into it, then it is dry or jammed. If the pipes as well as the pump are hot, not.

The system looks very modern. Is it a sealed system, with a pressure gauge on the boiler reading e.g. 1.5 BAR? If so, then it is unlikely to be dry. Follow the pipes along looking for any valve that might have been closed for summer.

Also, look at the pump, there will be a large silver screw in the middle of the round face. Undo this (water will not squirt out but there might be a drip). Does air squirt out? Turn off all power to the heating system. Put a small screwdriver through the screw hole. There is a slot in the end of the motor spindle inside. Can you rotate it with the screwdriver?

Meanwhile, ask around for a good heating engineer. To my eye, the installation looks very neat and professional. Maybe you have a fault, and maybe there is a control somewhere that is switched off. The installer may have left his details on a card or sticker. If your neighbours have similar installations one of them may know who installed or maintains it. Or ask the agent or previous occupier.