heating system problem, a real head scratcher!!

DriversEd

hi,
i've been having a problem for a while now, and it hasn't been adhering to the regular fixes.
the hot water flow in from the boiler is scalding hot, but regardless of whether we have it heating the house and tank, or the tank only, downstairs or upstairs etc, the return out to the boiler is only luke warm at best. we've changed the pump, even gone a size up. we've changed the expansion vessel at the boiler, flushed the system several times, bled it over and over. we've no leaks and now we even have hot spots ticking that never ticked before as the boiler is sending in very hot water.
is there anything you can think of that we ight be missing?

any help is greatly appreciated by me ever thinning hair!!

ed

.243

pm sent

DoneDL

The return may be at a low temperature but what exactly are you enquiring about, are the rads hot, is your hot water up to temperature and the hot spots you refer to, are these on the rads?

markaarkgas

need further details as per above responce , on hot spots etc.