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Valliant ecotec when I turn on the central heating 1. the…

Customer Question
valliant ecotec when I turn on...
valliant ecotec
when I turn on the central heating
1. the burner goes on
2. the diverter switches to central heating
3. the motor runs
4. no hot water leaves the boiler to go to central heating
5. get s.7 code motor over run
this fault occurred when the engineer installed a wireless thermostat and serviced the boiler he no longer returns my calls
any ideas what could cause this ? thanks
Submitted: 7 months ago.Category: UK Plumbing
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Answered in 19 hours by:
11/21/2017
Plumber: Andrew Smith, Engineer replied 7 months ago
Andrew Smith
Andrew Smith, Engineer
Category: UK Plumbing
Satisfied Customers: 3,781
Experience: Domestic Gas, Commercial Gas, LPG, Unvented Hot Water, Part P Electrical, Commercial Catering
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It sounds like the divertor is not opening internally?
Does the heat stay inside the boiler?
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Plumber: Andrew Smith, Engineer replied 7 months ago
Not done right.
Both the plastic condense and copper PRV discharge are supposed to go outside. The copper pipe is supposed to be copper all the way as it comes from the safety valve
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Plumber: Andrew Smith, Engineer replied 7 months ago
S7 I think is the code for no demand - I take it the hot water still works?
The heating us not working because the boiler is not being told to turn the heating on
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Customer reply replied 7 months ago
hi hot water in taps work just no heating , when central heating is requested it signals that the burner has started but no hot water gets sent to radiators
Plumber: Andrew Smith, Engineer replied 7 months ago
S7 is no demand - like in standby
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Customer reply replied 7 months ago
tried again still s.7 code , do you think I need to call someone out does it sound like something fixable without opening the thing upp? thanks
Plumber: Andrew Smith, Engineer replied 7 months ago
You will probably need an electrician to sort out the room stat wiring to ensure it fires the boiler
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Customer reply replied 7 months ago
cool will do thanks dave
Plumber: Andrew Smith, Engineer replied 7 months ago
No problem
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