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JamesI
JamesI, Handyman
Category: Appliance
Satisfied Customers: 5763
Experience:  I have repaired and maintained numerous items over the years, from fridges to freezers, radios to TV's.
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My heating is not starting off, vaillant ecotec plus, ive

Resolved Question:

My heating is not starting off
JA: What's the brand and model of your appliance? How old is it?
Customer: vaillant ecotec plus
JA: How long has this been going on? What have you tried so far?
Customer: ive bled my radiators restarted the boiler several times
JA: Who makes your radiator? How old is it?
Customer: honeywell not sure on age
JA: How long has this been going on with your Honeywell radiator? What have you tried so far?
Customer: This is the first time I’ve tried to get heating since the summer s0 is the code on screen
JA: Anything else we should know to help you best?
Customer: no I don’t think so
Submitted: 7 months ago.
Category: Appliance
Customer: replied 7 months ago.
Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call.
Customer: replied 7 months ago.
Let me know if you need more information, or send me the service offer(s) so we can proceed.
Customer: replied 7 months ago.
How long will it take to hear back?
Customer: replied 7 months ago.
I’ve sent the service Ofer
Customer: replied 7 months ago.
Can you help with my query please?
Expert:  JamesI replied 7 months ago.

Hi, thank you for choosing Just Answer, my name is ***** ***** I will help with your query today.

So your boiler doesnt start up when you turn on the heating \ turn up the thermostat, and you have a S0 code shown on the display?

Customer: replied 7 months ago.
that’s right
Customer: replied 7 months ago.
s7
Expert:  JamesI replied 7 months ago.

Ok what is the current pressure showing (how many bar)

Customer: replied 7 months ago.
4
Expert:  JamesI replied 7 months ago.

S0 means "Heating has no heat demand. The burner is off." so your timer or thermostat is not calling for heat.

S7 means "The pump overrun for heating mode is activated." which is a configuration of the pump circulation

Neither of these suggest a fault with the boiler, and would suggest the issue is the boiler isnt getting a demand for heat so would look at your thermostat. Is it a mechanical or digital, and wired or wireless?

Customer: replied 7 months ago.
I know what the error codes are it says that in my manual
Customer: replied 7 months ago.
I’ve no idea what my thermostat is
Customer: replied 7 months ago.
It’s a Honeywell cm161
Customer: replied 7 months ago.
With batteries which I just changed today as the screen was blank earlier
Customer: replied 7 months ago.
Now the screen is no longer blank
Customer: replied 7 months ago.
But my radiators are not coming on
Customer: replied 7 months ago.
I have bled them all
Customer: replied 7 months ago.
What do you suggest I do with my thermostat?
Expert:  JamesI replied 7 months ago.

Right this is a wireless thermostat, can you see a small receiver box (square shape with a button and 2 lights on it) next to the boiler, if so what lights are showing.

Customer: replied 7 months ago.
No
Customer: replied 7 months ago.
I took the thermostat off the wall and put it back on
Customer: replied 7 months ago.
That’s the boiler
Customer: replied 7 months ago.
That’s the thermostat
Expert:  JamesI replied 7 months ago.

The thermostat is showing demand for heat the flame but the boiler isnt getting the signal.

Are you able to take a picture showing the surrounding of the boiler eg 60cm either side?

Customer: replied 7 months ago.
This is it in the cupboard
Customer: replied 7 months ago.
It keeps going back to s7
Expert:  JamesI replied 7 months ago.

Right this is a wired thermostat, and so boiler is getting demand for heat.

Have you changed any of the settings on the boiler?

Customer: replied 7 months ago.
Just reset the boiler a few times
Customer: replied 7 months ago.
It seems to light up
Customer: replied 7 months ago.
go through the motions but mostly is on s0 or S7 afterwards
Expert:  JamesI replied 7 months ago.

If its showing S0 then it points towards the thermosat not providing a call for heat so if its got the flame showing make sure its correctly seated on the back plate.

Customer: replied 7 months ago.
How do you mean correctly seated on the back plate?
Customer: replied 7 months ago.
This info is in the help manual and videos online but I just need the fix really not what’s each thing means. How do I make the thermostat call for heat?
Expert:  JamesI replied 7 months ago.

Well as someone not qualified to work on boilers as a consumer your limited on what you can do, as you need to be checking the stat is generating a call for heat as stated previously.

So using a multi meter checking you have continuity between the A and B terminals, if you do and getting S0 on the boiler you have a PCb fault as its not detecting the demand from the stat, assuming its on the wall bracket correctly.

Customer: replied 7 months ago.
Ok thanks. Is there a way of correcting a PCb fault myself or not?
Expert:  JamesI replied 7 months ago.

You would need to strip down the boiler to access the PCB, and building control regs require that to be a gas safe registered engineer.

90% of the time its the thermostat at fault.

Customer: replied 7 months ago.
Well I took the thermostat away from the wall an hour ago but it was hard to push back on but I did it. Assume there’s nothing I can do with the thermostat myself?
Customer: replied 7 months ago.
I have no tools really
Expert:  JamesI replied 7 months ago.

So if the thermostat is not on the wall bracket properly or wires not terminated properly on the wall then the call for heat wouldnt get to the boiler so would start checking the wires are terminated properly and the stat is sitting on the wall plate (see manual here)

If you dont have a multi meter you wont be able to check the A and B terminals have continuity, so will likely need a engineer to attend.

Customer: replied 7 months ago.
Thank you. That link doesnt work. Can you send it to my email or something instead please?
Expert:  JamesI replied 7 months ago.

See attachment.

Expert:  JamesI replied 7 months ago.

The first is the user guide and this one is the install guide.

Customer: replied 7 months ago.
Thank you