ATAG Boiler Repair | ATAG Boiler Service | Bristol and Bath

Bristol 0117 9109813 | Bath 01225 220014 | Mobile 07968 246049

Do you need an ATAG boiler repair or a boiler service? Has your boiler stopped producing hot water?

We, at Core Heating, understand the urgency that situations like these can bring. That is why we have modelled our business so that we can respond quickly to your call. We can offer a same day response* to your boiler repair or we can arrange an appointment to suit your needs.

Not only can we respond the same day, but our heating engineer is an ATAG boiler specialist. With over 20 years experience in repairs and servicing, we are proud to say that the majority of repairs are diagnosed within the first hour, which translates into cheaper costs for you.

* subject to availability

Why not call Core Heating today to see how we can help

Bristol 0117 9109813 | Bath 01225 220014 | Mobile 07968 246049


ATAG Boiler Service

ATAG Manufacturers highly recommend that your gas boiler is serviced every 12 months. In doing so, it will ensure that your appliance is working efficiently and safely within your home. When we are called in for a boiler service, we will ensure that your appliance is working according to all current regulations so that you can have peace of mind that your home and family are safe. It is important to note that to carry out a service, your boiler needs to be fully functional. However, if your boiler isn’t working, don’t worry, we are specialised in repairs too!

Please call us today for our current price structure. We look forward to hearing from you.

ATAG Boiler Repair

So, your boiler isn’t working! Is it displaying a fault code? Here is a list of some of the common ones we come across:

10      Outside sensor error
20      Flow sensor error
40      Return sensor error
50      DHW sensor error (iC-Range only)
61      Bus communication error
78      Water pressure out of range
101    Overheat error
105    Venting program active when power turned on or interrupted (runs approx. 7 mins)
108    Pressure needs filling to < 0.5 bar
109    Pressure > pmax error
IP4.   Pressure needs filling to 0.5 – 0.8 bar
110   Safety temperature exceeded / Send probe damaged
111   Maximum pressure exceeded
112   Return probe error – could be damaged
114   Outdoor sensor error – could be damaged
117   Pressure too high (> 3 bar) or pump pressure increase too high (iC & iS Range only)
118   Pressure too low (< 1 bar) or pump pressure increase too low (iC & iS Range only)
119   Link on X2 position 4 and 5 missing
129   Fan error (fan does not start up)
133**   No flame after 5 ignition attempts
141   Central heating flow switch is open
151   Fan error (speed control is not achieved or is out of range) or control unit defective
154   Flow temperature increases to fast, return > flow
201   Domestic hot water (DHW) probe damaged
203   Tank probe damaged
303   Printed circuit board (PCB) error
304   Too many resets have occured
501   No flame detected
612   Fan fault – fan isn’t starting up

Boiler breakdowns always come at a bad time, so we will try our hardest to make sure your disruption is kept to a minimum. You may have a fault code that isn’t displayed in the list above, don’t worry, we can still help you to sort it out. Why not give us a call to see how we can help… FAST!

Check out our testimonials…

Why not take a look at what our customers say on our testimonials page. After all, it’s not what we say that is important, rather it is what you as a customer say that is the most important.


We look forward to hearing from you!

CALL US ON 07968 246049