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Troubleshooting - IDEAL MINI C24 User Manual

Ideal industries boiler user manual
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Points for Boiler User
Note. In line with our current warranty policy we would ask that you check through the following guide to
identify any problems external to the boiler prior to requesting a service engineers visit. Should the
problem be found to be other than with the appliance we reserve the right to levy a charge for the visit, or
for any pre-arranged visit where access is not gained by the engineer.
Troubleshooting – Typical Non Product Faults
Problem
Boiler is not working for
central heating or hot water
Boiler goes through ignition
sequence but will not fire for
either central heating or hot
water and then goes to
ignition lockout
Fan & pump run
continuously but there is no
attempt at ignition
Mini C Only
Operating for hot water but
will not operate for central
heating
The nature of all combination boilers is to heat up water directly from the incoming mains water supply directly
through the boiler to supply domestic hot water at the stated flow rates, (as shown in the boiler installation
instructions), to achieve a 35°C temperature rise. As the ambient temperature of the cold main varies during the
summer and winter months it is likely in the colder winter months that the flow rate will need to be reduced at the
outlet taps to achieve the same temperatures achieved in the warmer summer months. This is not a fault with the
appliance but is relevant to the varying temperature of the incoming cold mains water supply.
Mini S Only
Operating for hot water but
will not operate for central
heating
Operating for central heating
but will not operate for hot
water
Ideal Consumer Helpline
Tel: 01482 498660
www.idealboilers.com
Is there power to the boiler i.e. is the left hand side green LED (A) alight and
flashing every 4 seconds. If not this is not a boiler fault – contact the installer
Check pressure gauge on boiler shows a minimum of 1 bar
If not re-pressurise via the filling loop to 1 bar (if unsure contact your
installer), turn off the tap on the filling loop and press the reset button (D) to
reset the boiler. If unable to do so or if the pressure continues to drop after
filling then contact your installer
Is the lockout signal lamp (E) alight – Press boiler reset button (D) – If boiler
still does not fire contact the installer
Check gas supply (try another gas appliance cooker/fire etc) If no gas
supply then this is not a boiler fault – Contact the gas supplier
Check that the air pressure switch test caps, on top of the boiler, are fitted
correctly.
Check that integral programmer is set to an 'on' period and the function
switch is set to 'auto' – If it still does not operate contact your installer
If fitted with an external programmer check that the central heating channel
is set at an 'on' period – If it still does not operate contact your installer.
Check the room thermostat is set at the required temperature – Test the
room thermostat by turning fully up – If this does not respond contact your
installer
Check the radiator temperature control (C) is set at the winter setting for
central heating.
If fitted with an external programmer check that the central heating channel
is set at an 'on' period – If it still does not operate contact your installer.
Check the room thermostat is set at the required temperature – Test the
room thermostat by turning fully up – If this does not respond contact your
installer
If fitted with an external programmer check that the domestic hot water
channel is set at an 'on' period – If it still does not operate contact your
installer.
Check the cylinder thermostat is set at the required temperature – Test the
cylinder thermostat by turning fully up – If this does not respond contact
your installer
Caradon Ideal Limited pursues a policy of continuing improvement in the design and
performance of its products. The right is therefore reserved to vary specification without notice.
Ideal Boilers, P.O. Box 103, National Ave, Kingston Upon Hull, HU5 4JN. Tel.
01482 492251 Fax. 01482 448858. Registration No. London 322 137.
Solution

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Questions and answers

Liz Priest
January 29, 2025

We have a boiler installed in a rental property. The tenant has contacted me to say the boiler is making a loud banging noise (a neighbour 2 doors down can hear it). It was installed in May 2022 and is an Ideal I mini C. We have had the the engineer who installed it go and have a look but he can’t find anything wrong. Can you advise anything ?

1 comments:
Mr. Anderson
February 10, 2025

A loud banging noise in an IDEAL MINI C24 boiler could be caused by several issues, including:

1. Air in the System – Trapped air can cause banging or gurgling noises. Bleeding the radiators and ensuring proper system venting can help.
2. Low or Fluctuating Water Pressure – Check the system pressure gauge (G) and repressurize if needed.
3. Kettling (Limescale Buildup) – Limescale buildup in the heat exchanger can lead to overheating and banging noises. Flushing the system and adding an inhibitor may help.
4. Pump Issues – A faulty or blocked pump can cause water flow problems, leading to noise.
5. Blockages or Restrictions – A partially blocked heat exchanger or pipework can cause water to overheat and create banging sounds.
6. Faulty Gas Valve or Burner – If the burner is not operating correctly, it may cause irregular ignition and noise.

If the issue persists, professional servicing by a qualified technician is recommended.

This answer is automatically generated

This manual is also suitable for:

Mini c28Mini c32Mini s24Mini s28
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