Search the forum,

Polypipe underfloor heating

Discuss Polypipe underfloor heating in the Plumbing Jobs | The Job-board area at PlumbersForums.net

M

Matt74

Messages
7
Hi
I have a polypipe multizone underfloor heating system (Gas) that stopped working a few weeks ago.
It had been making some screeching noises and my hunch in that the Grundfos pump has died as the screeching has stopped - along with the heating! I may be wrong of course.
The LED's on the side of the pump are not lit.
Pics of control units attached.
Hot water and radiators are fine. Its just the underfloor that has stopped.
I took out the central pump screw and the spindle is turning freely so I don't think its blocked.
It's cool to the touch also so I'm wondering of its a fuse ?
Any help would be appreciated.
20190308_115144.jpg
20190308_115144.jpg


20190308_121554.jpg
 
Last edited:
you can check the pump very easily if running should be vibrationg or if you can remove the silver screw from the middle some water may come out and check to see if the pump is spinning (so long as there is a call foir heat)if it isnt try turning the pump rotor using a small screwdriver if it is stiff and wont turn (should turn easy) then pump is goosed new one required you need a grundfos ups 25 40/60 or equivalent model
 
Matt74 said:
It had been making some screeching noises
Click to expand...

That noise was something saying "I'm about to die, it's time to call a heating engineer"

Based on your description of the symptoms, assuming the screeching was continuous while the UFH was on, you will probably need a new pump installed. It's also possible that by leaving it to die it's overloaded the control unit. If you're lucky this won't have caused any permanent damage but it'll need checking.

The fact you were willing to ignore screeching tells me that you are not competent to treat this as a DIY job, so contact the firm who installed it or, if it's out of warranty, a reputable local heating engineer. Expect a bill of a couple of hundred quid plus, pumps are quite pricey these days.
 
Last edited:
Hot water and radiators are fine. Its just the underfloor that has stopped.
I took out the central pump screw and the spindle is turning freely so I don't think its blocked.
It's cool to the touch also so I'm wondering of its a fuse ?

Also - What does this thing do?

20190308_131207.jpg
 
Matt74 said:
Chuck - at the time I didn't realise where the noise was coming from and it happened at random times so could never isolate the source.
Click to expand...

Fair enough. If you are competent to use a multimeter and work on mains wiring have a go yourself. What's the worst that can happen...?
 
Matt74 said:
Who knows what the white box with the blue connector is?
Click to expand...
It’s where one of your problems is.
It’s a motorised valve. Once this opens, it sends a live to the pump.
So it looks like you motor on the motorised valve has gone, and possibly the pump.
Pump could just be air causing the noise.
 

Reply to Polypipe underfloor heating in the Plumbing Jobs | The Job-board area at PlumbersForums.net

Similar plumbing topics

N
Towel Rail Valve Advice please (35 Characters needed.)
I have had a look at previous posts and think I know the answer to this but just before I make it worse could I just check what you think about this one. Granddaughter just moved house and this valve decided to leak when it was closed. When open its fine. Normally I have repacked the gland on...
Replies
7
Views
163
Timmy D
T
P
Repeated Airlock in Bathroom
Hi, Can anyone advise as to why the cold water to my bathroom keeps airlocking? This originally happened about 12 months ago and has happened 3-4 times since. It’s an upstairs bathroom, fed from a tank in the attic. The tank is about 8 Meters away and feeds a bath, sink and toilet. The tank...
Replies
9
Views
304
Chuck
C
D
Covering shallow sewer pipe under concrete Patio
Hello all, I’m replacing a concrete paving slab patio in the back yard. The original patio used 50mm deep concrete slabs on hardcore & sand. I’m planning to pour a 100mm deep concrete patio on 100mm hardcore. In order to achieve the same final height to line up with the rest of the patio, I...
Replies
6
Views
215
DIwhYdidIstartThis
D
Creating content since 2001. Untold Media.

Newest Plumbing Threads

Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock