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https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl DIY Forum >> Plumbing Questions >> Isar he30 https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl?num=1417083527 Message started by Roy on Nov 27^th, 2014, 10:18am

Title: Isar he30
Post by Roy on Nov 27^th, 2014, 10:18am

Hi I have a he30 boiler with a honeywell cm900 stat. I have hot water and no central heating. No fault codes are shown I have the letter c and a flashing led.
Roy

Title: Re: Isar he30
Post by thescruff on Nov 27^th, 2014, 2:25pm

Have asked in the gas forum for you

Title: Re: Isar he30
Post by thescruff on Nov 27^th, 2014, 11:16pm

From the horses mouth, the C and flashing led means the heating is in standby mode.

Likely problems

Dripping tap.

Stuck diverter valve head

The first you can check and the second best to get an RGI in