- Plumbing Help Needed – Combi Boiler DHW not working!
All was well until I bled a rad the other night. Now we get CH as per programmed but no hot water on demand. Had a look in the boiler (getting quite familiar with it now!) and the actuator comes out of the 3 way diverter and presses the microswitch, but the boiler doesn’t fire up. If the heating is on at the time, the boiler just goes out ans stays out, and then doesn’t come back on for the heating.
I took the DHW microswitch and activated it manually and it fired up – got the missus to then turn a hot tap on and the boiler went out!
Any ideas what’s going on?
(its an Ideal (!) c80ff if it helps)Posted 7 years agospooky_b329Member
Central heating boiler pressure too low? Not 100% familiar with the different types of boilers but if the rads are a closed system you may have a filling loop you can connect to put the pressure back into the recommended zone on the gauge.
Edit: Sorry, miss read the post and thought you had hot water and no heating…Posted 7 years ago
The diverter pin is defo coming out plenty – had an issue with it seizing in the past, so been lubing it up – there is a slight leak out of the aperture come to think of it, could this be the source?
Also, the rad in question seems to need bleeding every 2 months or so.Posted 7 years ago
Tall towel rad?
Does seem a bit odd.
Does your boiler ever need refilling due to high pressure discharge?
I’m thinking possibly a weak valve on the filing loop, coupled with a dodgy micro switch.
Try swapping both, you’ll get a micro switch cheap on ebay, or try parts center/plumb centerPosted 7 years ago
The topic ‘Plumbing Help Needed – Combi Boiler DHW not working!’ is closed to new replies.