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Andrew Smith
Andrew Smith, Home Appliance Technician
Category: Appliance
Satisfied Customers: 3756
Experience:  Gas cooker specialist
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Vaillant boiler - central heating downstairs too high

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Vaillant boiler - central heating downstairs higher temperature than should be but upstairs not on at all which is correct- what is the problem

Boiler keeps firing every 5 minutes to keep boosting the temperature.

It is set to be 20 degrees now but it is now 24 degrees

XXXXX XXXXX : Where are you setting the temperature?
XXXXX XXXXX : where are the room stat(s) located?
XXXXX XXXXX : what is the boiler temperature set at
XXXXX XXXXX : do you have TRV's
XXXXX XXXXX : all thses can affect the air temperature in different parts of the housr

We have not changed any of the settings and it was working perfectly. Then last evening the temperature downstairs kept on rising above the set temperature.


The room stats are in the hall and this is where the temperature is set. What are TRV's. It is very worrying that the temperature continues to rise above the set temperature but only downstairs

XXXXX XXXXX : Do you not have thermostatic radiator valves?
XXXXX XXXXX : Also, do you have a motorised valve in the airing cupboard - this is your most likely cause
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