On Mon, 04 Nov 2019 17:45:19 +0000, Roger Hayter wrote:
Running hot for 30 seconds when the CH is on sounds like residual heat in
the heat exchanger and the boiler not firing at all when HW is called for.
We are assuming that HW is actually turned on at the boiler. :-)
There are usually separate controls for CH and HW flow temperature, and
often separate controls to enable CH and HW on the boiler; an alternative
explanation could be that the boiler is accidentally configured not to
supply hot water, only cold.
Always double check things like this first.
On the lines of "Is it plugged in with the switch turned on? Can you see
any lights?" when dealing with computers.
AMD FX-6300 in GA-990X-Gaming SLI-CF running Windows 7 Pro x64
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.