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Well problem resolved the code 28 on the ravenheat he csi120 means low pressure ,a faulty low water pressure switch or a faulty " flue fuse" ok no mention of flue fuse anywhere in the manual or the Internet that's just what ravenheat technical call it .It screws into the flue some might call it...

Watch this space all will be revealed and explained with on the next 2 days might be able to educate even you rgi's out there

I'm sorry but that reply makes absolutely no sense is there anyone out there that can advise me correctly on this matter

Yes I will take your advise and get a professional rgi in but still interested to know where this flue fuse is situated Can you tell me

i thought the flue fuse was one of the fuses on the pcb but apparently its not i was advised to check the continuity on either the red and white wires that lead to the flue sample point or the flue sample point itself i bridged both with a test meter and had no continuity on either is that...

Funny you say that because I've just been on to ravenheat and they say can't be anything other than pressure,switch or flue fuse all are ok and I take it you mean check for continuity across the terminals on the switch there are three and I get continuity across 2 off them the only thing I...

can anyone help with this puzzle i have a ravenheat combi it displays a code no. 28 . After a reset it goes through its normal sequence then after approx 3 secs it locks out displaying the above mentioned code .the first thing i checked was the pressure it was at just over 1/2 a bar so i...

thanks chrisr but can you be more specific

can anyone help with this puzzle i have a ravenheat combi it displays a code no. 28 . After a reset it goes through its normal sequence then after approx 3 secs it locks out displaying the above mentioned code .the first thing i checked was the pressure it was at just over 1/2 a bar so i...