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    Boiler delivers hot water but no heating - what's going on?

    Hi there The same motor fits many two way valves. You can buy just the motor at any plumbing suppliers, or much cheaper if you are on EBAY. Try searching on 'SYNCHRON MOTOR' The motor is quite easy to change and has only two wires which can be connected either way around...
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    Boiler delivers hot water but no heating - what's going on?

    Hi KM10 Yes, the circuit is fine . SW1 and SW2 are just a little confusing . People need to know that on SW1 although it doesn't look like it on the ' typed' circuit, the common is the lower terminal connected to the motor, and on SW2 the common is the top terminal, connected...
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    Boiler delivers hot water but no heating - what's going on?

    Hi saintgeorge Ref the lever in the notch question The lever is not connected to the quadrant that does the water valve/ electrical switches movement , it just pushes it to the right. So with the lever in the notch, the motor if it was good, could still move the quadrant to the...
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    Boiler delivers hot water but no heating - what's going on?

    Hi mandate I agree with what you say. When I originally said that the switch is made when the lever is pushed all the way across, I was explaining to saintgeorge the difference between two test he did, and he could not understand why. He thought it was a sequence problem...
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    Boiler delivers hot water but no heating - what's going on?

    Hi there saintgeorge Do you do Ebay ? There are two motors at item No 290058128182 Ending soon !! Rgds David C
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    Boiler delivers hot water but no heating - what's going on?

    Hello mandate Yes there are two switches , No 1 transfers just at mid position to remove the 240 v drive from the motor to allow it to stop at the mid position , held there by the 240v supplied on the white wire from heating required, then via the normally closed contact...
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    Boiler delivers hot water but no heating - what's going on?

    To ChrisR Chris I am surprised at your statement out of the blue In a conventional Honeywell 3 way valve there are two switches one of them has its common connected to the WHITE wire which will have 240 volts on it when central heating is calling . This switch is transfered either...
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    Boiler delivers hot water but no heating - what's going on?

    Hi saintgeorge I read through your test results again just now. The reason that the results seemed different in the two sequences that you performed was because a switch inside the valve top metal box transfers when you push the lever all the way to the right but does...
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    Boiler delivers hot water but no heating - what's going on?

    Hi Sorry for late reply. First about the auto/manual lever. When it is latched in the MANUAL notch it is in the MID position and means both ports A and B are open. It is intended ONLY to assist in draining the system. However in this latched position with hot water timeswitch ON...
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    Boiler delivers hot water but no heating - what's going on?

    Hi its me again The three way valve is a very strange beast. !! With the Timer water switch ON and the tank thermostat saying 'Tank not hot enough ' the boiler will fire up and the three way valve will be at a position for port A to be open. It is forced there by a...
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    Central heating V4073 valve

    A bit of the link was missing for some reason Last bit should have been htm#heating Rgds again David C
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    Central heating V4073 valve

    Thank you for your Reply Chris R !5 years ago I retired from IBM as a computer engineer. We had a specialist called Tony Lenton who you could ring any time day or night and he would get you out of the SH*T I called him this morning and asked if he had any 'call outs' lately . He straight...
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    Central heating V4073 valve

    Hi All Does anybody have a circuit showing the INNER wiring of the Honeywell V4073 Mid posn valve. I recently replaced the burnt out synchron motor in my system a couple of days ago and the replacement motor burnt out the next day. Further investigation shows that there is 240 volts...
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    Help with ancient system please.....

    Hi I read this post with interest as I have ' been there' , but it was only for a day or so . Having checked a lot of things to discount them I removed the pump and made up a couple of addaptors to attach to the system and connected long hoses to both. The other ends were out in the garden . I...
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    Boiler delivers hot water but no heating - what's going on?

    Hi I don't know the boiler you name but If its a combi do not read on. If it's not a combi and you have a storage tank in the airing cupboard and a 3 way valve, then your problem is probably a burnt out little motor inside the top of the three way valve. You can prove it by moving the...
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