Can anyone help or advise on a sola 60 system.
The frost protection plugs on the panels keep popping off.
They didn't used to do this and we have heavy frosts here, but for last 3 years or so we have them popping off with some frosts.
The system is not as efficient as it once was, it often used to boil the hot water tank in summer but hasn't done this for a few years now.
We live between Napier and Palmerston North but our local plumbers are not sure what the problem is.  Is there anyone who could help??
Thanks.


Linkback: https://www.plumbers.nz/central-heating-and-underfloor-heating/8/sola-60-problem/1472/