Heating problem - Isar HE24 combi boiler / Honeywell CM67

Joined
18 Feb 2009
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Location
Tyne and Wear
Country
United Kingdom
Hi there

We've been having problems with our heating system recently.

We have an Isar HE24 combi boiler with a Honeywell CM67 digital thermostat.

Our central heating system seems to ignore the thermostat and have a mind of its own. It has always been set to automatic to come on for a short while in the morning and then late afternoon until evening.

Just lately our shower has been cold and had to be turned up to max to get luke warm water and the heating system is ignoring the thermostat, even when the thermostat is turned off! The heating still remains on!

We'd be very grateful for any advice on this!

Kind Regards

grpo
 
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Sounds like the DV is stuck mid position and the HW pre-heat is keeping the rads warm
 

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