Motorised valve clicking/ticking noise

[r4w]

Hi, in my new home I have a couple of Danfoss hpa2 valves that I believe are used to separate the heating of the master bedroom with the rest of the house.
I have two Tado smart thermostat that are working with the system.
However, whenever I hear the Tado's relay switch off the heating as it reached the temperature (the boiler is from Ideal), the two valves starts to clicking/ticking until the boiler goes completely off.
I'm wondering if this is normal or if I should raise this with the builder.
Thank you in advance

 

[jeff the gasman]

It’s normal or a bomb. Evacuate the premises and call the bomb squad to be sure.
Good luck.

 

[dilalio]

Can you upload a video of the noise?
Might be spring mechanism or might just be thermal ticking. If both are doing it then may just be normal? Honeywell are the only valves I use.

 

[r4w]

It’s normal or a bomb. Evacuate the premises and call the bomb squad to be sure.
Good luck.

OMG, I'm calling the bomb squad right away!

Can you upload a video of the noise?
Might be spring mechanism or might just be thermal ticking. If both are doing it then may just be normal? Honeywell are the only valves I use.

You know builders, I didn't even know I was getting the valves... figure the brand.

I have taken a video yesterday morning:

Thanks!

 

[jeff the gasman]

Faulty with that noise mate. Or explosion imminent.
I’ll get me tin hat

 

[r4w]

Faulty with that noise mate. Or explosion imminent.
I’ll get me tin hat

Is/they are definitely faulty?
Does the thermostat have anything to do with this?

Just asking as I have replaced the original Danfoss Thermostats with the Tado ones, however the heating works correctly until the temperature has been reached.

 

[dilalio]

That's not right at all! I think a wiring issue... Reverse polarity? Sounds like motor is winding the wrong way

 

[r4w]

That's not right at all! I think a wiring issue... Reverse polarity? Sounds like motor is winding the wrong way

I'm surprised that whoever installed the system didn't notice this before but thank you @dilalio and @jeff the gasman, I'll report this to the builder to be checked.
I just hope they will not make a big noise that I have changed the thermostats.
Cheers

 

[jeff the gasman]

I'm surprised that whoever installed the system didn't notice this before but thank you @dilalio and @jeff the gasman, I'll report this to the builder to be checked.
I just hope they will not make a big noise that I have changed the thermostats.
Cheers

They more than likely will. Throw your hand in to save a possible bill.

 

[picasso]

Might be no bypass fitted and the pump is forcing the valves open on pump overrun, the valves use ac synchron motors so cant be wired reverse polarity.

 

[r4w]

Might be no bypass fitted and the pump is forcing the valves open on pump overrun, the valves use ac synchron motors so cant be wired reverse polarity.

Thanks, I didn't really think it was a such big issue, as everything is working normally when it's on.

 

[dilalio]

Might be no bypass fitted and the pump is forcing the valves open on pump overrun, the valves use ac synchron motors so cant be wired reverse polarity.

I was stabbing in the dark a bit mate... hence the ? After my reverse polarity comment

 

[picasso]

No problem dilalio

 

[r4w]

Thank you all, I'm contacting the builder to have them both checked!

 

[ianmcd]

is your pump near the valves ? sounds more like a pump noise rather than a valve fault