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I'm in need of some help! My heating system which supplies my house and my garage has gone a bit funny...
I have a Baxi 45m back boiler and I have no hot water, just puts the heating on rather than heating the hot water tank?
I'm hoping its an easy fix with a stuck valve or something?
Before the thread police remove this, it is car related as it supplies my garage and I'm not allowed out until its fixed!
Scott.
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nutter81
Part of things
I joined facebook so i could talk to the missus
Posts: 928
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Nov 12, 2011 12:46:46 GMT
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pm sent
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carmad
Posted a lot
Posts: 2,002
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Nov 12, 2011 16:15:47 GMT
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Scott I am a heating engineer also gimme a bell
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Nov 12, 2011 17:55:13 GMT
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Check the two 2-port valves or the one 3-port valve. If you get heating but not hot water, my money is on a stuck motor head on the valve.
Take the head off and see if the valve moves easily. If it does, buy a new head and fit it.
Most of the time the valve is fine, just a borked actuator. Easy and cheep fix.
Lewis
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Nov 12, 2011 17:58:52 GMT
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I'm not sure where this thread belongs best but it's deffo not in the main section  |
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marksparks999
Part of things
I aim to live forever, or die trying!
Posts: 656
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Nov 12, 2011 18:15:32 GMT
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why have you got your heating on... its not december yet! (i just tell swmbo to stick another jumper on)
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Retroless at the moment... but on the hunt for something old!
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Nov 13, 2011 16:47:03 GMT
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Thanks Nutter81 and Carmad, Ill be on the phone! Ive been at work all weekend and its now sunday night so probably not the best time to phone you... Marksparks999, I'm in Huntly, north of aberdeen......chuffin freezing up here already!! Lewis, I'm presuming the 2 port valve is the red thing in the pictures? I take it no water will come out if I take the head off? It does seem to be making a funky noise when the timer kicks in... Sorry for the really bad pics, my camera battery is flat, as usuall!! Scott.    |
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Nov 13, 2011 16:57:29 GMT
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Another thing Ive noticed is the little red valve under the red water pump is open. should this be open? It seems to bee feeding hot water into a cold pipe...?
I'm having trouble seeing how this system works as I cant trace all the pipes and see where they go so its a bit of a guess!
Scott.
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Nov 13, 2011 17:00:45 GMT
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Oh, and DarrenW, thanks for not deleting this, I'm starting to lose my hair over it! ;D
Scott.
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oldchap
Part of things
just hanging about
Posts: 202
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Nov 13, 2011 17:09:54 GMT
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I'm not a heating engineer, but the red thing is your pump looks like the white box is the valve
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what's that awful noise
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Nov 13, 2011 19:15:22 GMT
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the red ones your pump, white the diverter valve and the red round knobs a gate valve. looks like its being used as a by-pass so should be pretty much closed. the head of the diverter will screw off without any water yes. it looks like your heating pipe is going into the floor board so if that pipe is cold or just warm when your boilers on and calling for heat and hotwater then your diverter head gone or if the body does not move freely then the valve body maybe stuck.
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Nov 13, 2011 20:43:36 GMT
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Red round thing is pump. Sounds like it is working, if the heating is on.
So that does sound like the 3p port valve which is the big cream box with three pipes. If you trace them I image the one in the bottom is from the boiler, and the two on top are to the hot water tank and the central heating. Trace them.
You need to see if the one going to the hot tank is getting propper hot. If not the valve is stuck, or one of the gate valves is wrong. If it worked last year, or up until recently, and you havn't messed with anything, then the valve must be at fault.
I did the one on my parents house, a few weeks ago. It was stuck in hot water only mode, after a summer with no heating need.
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Righto, I think Ive got to the bottom of this! I took the head off the 3 port valve and I could turn the valve quite easily so thats working fine. Put it all back together and turned on the hot water and I could hear the valve head moving, very slow but definitly moving. Once I had figured out where the pipes go I found the little check valve was wide open and dumping hot water into my central heating circuit.
So, I wound the valve all the way closed and opened it about half a turn so it still bypassas a bit and....HOT WATER!!!!
Seems like the guy who serviced it must have opened it all the way as Ive never touched it since owning the house? That was ages ago though...
I might change the diverter head anyway as it seems to be really slow.
The other thing that surprised me was how quiet the pump is, when running it hardly makes a sound!
Thanks for everyones help!
Id still be scratching my head if it wasnt for you guys!
Oh, and I still havent heard back from any of the engineers I rang........
Scott
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Nov 14, 2011 10:50:12 GMT
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Well glad to hear it was something simple.
The valve heads generaly do move quite slowly. Perhaps a second or two to move full swing from one side to the other.
When was it serviced and when did the hot water pack up? Seems odd, but not impossible that the guy messed with the valves.
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Nov 14, 2011 17:52:42 GMT
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It was serviced about 2 months ago, sometimes it would be ok then other time no hot water...
Seems fine now though! Ive ordered another head from ebay, was about £15 so not exactly expensive and saved myself a £150 call out charge!
Thanks again,
Scott.
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Nov 14, 2011 19:08:59 GMT
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yeah the heads are cheep, and an easy piece of mind swap.
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Nov 14, 2011 20:29:52 GMT
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those heads are slow, thats normal so wouldn't change it for the sake of it. The gate valve shouldn't even be on there as its a y plan system so no need for it so just close it.
glad ya got sorted
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Oh really? I did wonder as I couldnt see a reason for it. After a few days of playing around with this Ive worked out how it all works, doesnt seem so scary now. Just when you first take the cover of and think "holy curse word, I don't know what I'm doing here!!" and the possibility of a massive bill from a tradesman!
Car stuff, I can do.
House stuff, massivly steep learning curve!!
Scott.
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