UFH Stone cold

[Cold fish]

Hello, just bought a new house in December, UFH gas boiler on ground floor. Open plan living area. Thermostat set on max (26), room temp is 16. Just paid extra £500 for extra accelerator pump. Still floor is stone cold, except one third of kitchen floor. Previous owners had system flushed 6 months ago. Any suggestions would be much appreciated, is ruining life in the
new house as can't sit downstairs !

 

[snowhead]

How old is the house?
Was the U-F fitted when the house was built?
If not how old is U-F?

Where was this expensive pump fitted?

 

[SimonG]

Airlock?

 

[kozak1968]

Zone valve could be faulty if one is fitted. If its a Honeywell it can be manually opened. Also check pump is spinning.

 

[Cold fish]

Hello, thanks for your replies. House is 15 years old. Suppose UFH was installed at that time. New pump is a grundfos pump. Temp gauge on manifold says 40, the return is 30.

 

[MRDrip]

Do you have details of the "extra accelerator pump" and where it's been fitted.

 

[Cold fish]

I am no expert, could not really explain technically. It is just next to all the blue pipes that go off into the living room etc. I can hear it is working but does not feel boiling hot. Plumber said it would definitely solve the cold problem but 24 hours later still 16 degrees.

 

[kozak1968]

40 flow 30 return sounds about right. It takes time to heat up.

 

[Cold fish]

I live in hope.....can't wait for the summer as feeling obsessed about how cold it is. Shame can't just put radiators instead.

 

[kozak1968]

Also sounds like air lock on one of the circuits as mentioned before. How many pipes on the manifold ?