My father passed away recently and my sister and I have to look after the house until it can be sold. It is fitted with a Potterton Lynx 2 combi boiler from the early 1990s, that only supplies hot tap water and three upstairs radiators, and I've discovered that it doesn't always fire up when there's a demand, either on timer C/H or opening a hot tap. My brother-in-law has been round with a plumber he trusts, who has diagnosed a faulty pump, and he told him it was obsolete. The pump seems to seize after periods of disuse and cooling, and starts to get hot when power is applied. Tapping the pump with a metal object brings it to life. I've taken the details and it is a Wilo Gold Star, Type F, TF95, apparently one speed (2700rpm). I've found a couple of used examples online, but all three speed, but the highest speed matches the one speed on our boiler. My own thoughts are that 3 speeds are not going to matter. My question is, seeing as new Wilo pumps of a different spec are still available, as well as reading on here a different thread on Lynx 2 pumps where someone recommended "Grundfos every time", how as a layman do I know if a different new pump will suit the old Potterton? I know there's a PCB that fires the pump up on demand, but does the pump need to be matched exactly to the original PCB, or in many ways, is a pump just a pump? Allowing of course for matching up specs like amps, watts and rotational speed (and whatever uF 3.5-400V means. Micro farads?) My dad had the boiler serviced as recently as early October so if the problem existed then, it wasn't attended to. Thanks for any advice anyone can offer.
Mick.
Mick.
