Boiler was worked on now Ufh doesn't work

[Jentailor]

Our boiler was losing pressure, dude came out and couldn't find the leak.  Depressurised the system, put inhibitors in and then topped up the system.  Since he left our Ufh no longer works. He returned that night and shrugged his shoulders and left again.  The night before storm Eowyn kicked off and we were in the red zone.  Over 36 hours in with no heating on in the house it is extremely cold and we have 4 young children 8 years and under in the house. 

Thermostat asks for heat, boiler turns on pumps water, actuator wax melts, but the flow meters don't allow the flow into the loops. Rightly or wrongly I have removed the locking ring on the flow meter and unscrewed them as far back as possible, for the important rooms, and the flow meter is showing full flow.  The rooms are so cold I can't see if that has even worked yet.

I can't do it to the upstairs system as it is older and different flow meters.  Kids rooms are down to 13 degrees and dropping quickly as the temperature outside is to drop below zero. 

Any help would be appreciated.  I've asked the boiler guys to come back ASAP as I believe it is their fault this has happened, but I doubt they are going to appear until Monday (if I'm lucky) and I can't have frozen children and baby. 

[Nickfromwales]

8 minutes ago, Jentailor said:

Depressurised the system, put inhibitors in and then topped up the system.  Since he left our Ufh no longer works.

So, I think you are now airlocked throughout.

 

Quick hack; take every actuator off except loop 1 (you choose), and then run the system. Wait for 20 mins to bleed out the trapped air, then open loop 2, and so on. Most advice I can give you tonight I'm afraid.

8 minutes ago, Jentailor said:

Our boiler was losing pressure, dude came out and couldn't find the leak. 

Genius.

 

8 minutes ago, Jentailor said:

He returned that night and shrugged his shoulders and left again.

Useless w8nker  I hope you've not paid for this disservice?!?

[Jentailor]

Do I bleed after bringing every loop back on individually? Or just the once after the 20 minutes? 

Thanks 

[Nickfromwales]

Just now, Jentailor said:

Do I bleed after bringing every loop back on individually? Or just the once after the 20 minutes? 

Thanks 

Each loop needs to be on for 20 mins to bleed itself, this assumes the automatic air vent is open. 
You start with all other loops off, actuators all removed, and then bleed 1 loop at a time. 

[Nickfromwales]

To do this properly, the idiot you called out should have purged every loop with cold mains water (to blast the air out). 
 

The problem you face is, the pump will move water through the UFH pipes at a snail pace, so if all the loops are open you can divide the pump power by the number of loops. You need 100% of the pump on each loop individually to stand a chance, hence my advice. 
 

Best I can offer at 00:25, but I’ve got 4 kids and I don’t want to see you or them freezing your rear ends off.

 

Go see the ‘technician’ that called out to ‘help’ and kick him in the testicles. Twice. As much use as a kickstart on a submarine. 

[Jentailor]

Thank you, I'll give it a go!