How to reset a Micron Boiler
- Thread starter gunthos
- Start date
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The reset light on solid is a "non-volatile lockout".
I had this issue when I had air in the system which must've ended up in the boiler.
Switched off boiler using the temp/off pot, got rid of air by turning pump on full bore for a couple of mins and switched back on again and fired up ok.
If this doesn't fix, likely a PCB failure which they are renowned for (if it's a glow-worm micron). Get a refurb from http://www.cetltd.com/ which will be much cheaper than from merchants.
If you change the PCB, you will need to change the thermistor at the same time.
I had this issue when I had air in the system which must've ended up in the boiler.
Switched off boiler using the temp/off pot, got rid of air by turning pump on full bore for a couple of mins and switched back on again and fired up ok.
If this doesn't fix, likely a PCB failure which they are renowned for (if it's a glow-worm micron). Get a refurb from http://www.cetltd.com/ which will be much cheaper than from merchants.
If you change the PCB, you will need to change the thermistor at the same time.
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D
davebgas
Firstly before jumping straight in for a (expensive) PCB, does the fan or anything run on the boiler?
Are you getting 230V back on the switched live from the system?
Are you getting 230V back on the switched live from the system?
G
gassafeman
Replace the Thermistor. If left alone, thay will wreck the PCB if it is faulty.
The newly designed board is a lot more reliable but is fairy expensive. An £11 thermistor (order the right one) is worth a punt if your poor at diagnosing your boiler fault.
Your fan is running isnt it?
Just realised this has been advised already. Oops!
Paul
The newly designed board is a lot more reliable but is fairy expensive. An £11 thermistor (order the right one) is worth a punt if your poor at diagnosing your boiler fault.
Your fan is running isnt it?
Just realised this has been advised already. Oops!
Paul
PCB's for the micron can be had off ebay, brand new, for as little as £35 if you catch it at the right time. From CET ltd, you can get a reconditioned one, which is probably more reliable than a genuine one as the parts used are of better quality, for £55 (that includes sending your old one back). Never buy one from a plumbers merchants or suchlike as you will easily add £100 to those prices.
For £11, it's worth tyring the thermistor first, but I'd like to bet that the PCB is already borked.
Both the PCB and thermistor are easily swapped out by a competent DIY'er despite what any of the "pro's" may say and will save you much money.
Best of luck.
For £11, it's worth tyring the thermistor first, but I'd like to bet that the PCB is already borked.
Both the PCB and thermistor are easily swapped out by a competent DIY'er despite what any of the "pro's" may say and will save you much money.
Best of luck.
the fan is not running on the boiler, when i turn it on there is nothing there, however the pump etc in the airing cupboard is working as i can hear it.
i have a British gas engineer coming to look at it and we have the homecare cover so hopefully that will cover it
i have a British gas engineer coming to look at it and we have the homecare cover so hopefully that will cover it
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