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I have ariston 24he, hot water working ok but no heat, the

Customer Question
hello i have ariston 24he...
hello i have ariston 24he, hot water working ok but no heat, the thermostat is calling for heat and the boiler makes a sound like its received the call but boiler doesnt do anything...
JA: How long has this been going on? And how severe is the problem?
Customer: a few days, no heat whatsoever, dhw all ok..
JA: Do you plan on doing the work yourself?
Customer: yep, as much as i can..
JA: Anything else we should know to help you best?
Customer: no..
Submitted: 1 year ago.Category: UK Plumbing
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Customer reply replied 1 year ago
No error messages came up..
Answered in 5 hours by:
11/28/2016
Plumber: Andrew Smith, Engineer replied 1 year ago
Andrew Smith
Andrew Smith, Engineer
Category: UK Plumbing
Satisfied Customers: 3,714
Experience: Domestic Gas, Commercial Gas, LPG, Unvented Hot Water, Part P Electrical, Commercial Catering
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What is the pressure gauge reading?

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Customer reply replied 1 year ago
Just under 2..
Customer reply replied 1 year ago
Dhw working ok, no error msgs...
Plumber: Andrew Smith, Engineer replied 1 year ago

Does the pump run at all when you turn on the heating?

Do you have a wireless room thermostat?

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Customer reply replied 1 year ago
Pump doesn't run when heating called for, salus wireless thermostat, as said when the ts calls for heat, the boiler makes a switching sound like it's trying to turn on, but nothing happens..
Plumber: Andrew Smith, Engineer replied 1 year ago

the boiler display used to change when the heating came on before?

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Customer reply replied 1 year ago
Maybe wiring prob all of a sudden?
Plumber: Andrew Smith, Engineer replied 1 year ago

We can rule out the stat if you want?

If you have a couple of screwdrivers?

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Customer reply replied 1 year ago
Tmrw I'll do it?
Plumber: Andrew Smith, Engineer replied 1 year ago

ok, you will need to take the cover off the receiver and look at the wiring.

Inside there will be a pair of power cables (L&N) and a pair of switch wires.

If you turn off the power and put both of the switch wires under the same terminal, then when you turn the power back on and it fires for heating it is a stat fault.

If not put the wires back as they were and we can try the next step.

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Customer reply replied 1 year ago
Sounds confusing, I'll try it tmrw..
Plumber: Andrew Smith, Engineer replied 1 year ago

ok, let me know when you have had a look

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Customer reply replied 1 year ago
the receiver is hard to get to, can i do this inside the boiler somehow, where the wires reach the boiler?
Plumber: Andrew Smith, Engineer replied 1 year ago

Yes if you find the 2 link wires (not the power) and replace the 2 connections with a simple link, it will do the same thing

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Customer reply replied 1 year ago
Ok I do tmrw..
Plumber: Andrew Smith, Engineer replied 1 year ago

No problem - come back and tell me what happens

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Customer reply replied 1 year ago
I will do and send you before and after pics..
Customer reply replied 1 year ago
Still nothing, how do I make it work from the control panel?
Plumber: Andrew Smith, Engineer replied 1 year ago

ok, boiler on at the 0/1 switch

boiler pressure over 1 bar

E/C switch is just for hot water preheat

Make sure the thermostat temperature is above the * setting for heating and it should fire up!

Does the fan run (noise at the top)?

This looks like the Ariston 31MFFI, is this right?

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Customer reply replied 1 year ago
No fan, it's a 24he microgenus..
Customer reply replied 1 year ago
Still nothing happening, is the boiler clock set up ok?
Plumber: Andrew Smith, Engineer replied 1 year ago

Perhaps the timer is faulty?

http://www.freeboilermanuals.com/assets/pdf/ariston/15.pdf

Try starting on page 60 to narrow it down

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Plumber: Andrew Smith, Engineer replied 1 year ago

Your clock is set to 'I' which is on, so it should not matter how it is set

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Customer reply replied 1 year ago
I have the manual, still no heat, what now?
Plumber: Andrew Smith, Engineer replied 1 year ago

It could be a faulty selector switch, PCB or clock.

Do you have a multimeter to check continuity?

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Customer reply replied 1 year ago
I have multimeter but not experienced in using it..
Plumber: Andrew Smith, Engineer replied 1 year ago

We can check most things with the power off and the meter set to continuity

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Customer reply replied 1 year ago
Can we do in an hour or so?
Plumber: Andrew Smith, Engineer replied 1 year ago

Your heating timer is set to off!

Can you move the selector to the 'I' position...

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Customer reply replied 1 year ago
I think I did but still didn't work, I'll try again now..
Plumber: Andrew Smith, Engineer replied 1 year ago

ok, let me know

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Customer reply replied 1 year ago
You want me to do multimeter in 10 mins or so? Where I put it?
Customer reply replied 1 year ago
Any more advice?
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Andrew Smith
Andrew Smith
Andrew Smith, Engineer
Category: UK Plumbing
Satisfied Customers: 3,714
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