Hi
I have an Ideal Mini C28 / re-badged Biasi boiler. There is an intermittent issue whereby at random points I get no hot water from the boiler, unless the central heating is on.
I have read through the diagnostics section of the manual and located the dipswitch to aid in fault diagnosis. The boiler appears to be the older type, with two PCBs and 3 LEDs and when the boiler is in the fault condition, the LED on the left is blinking green very fast, the middle LED is solid red and the LED on the right is off. The manual states the following error code:
Faulty primary circuit
(no water or absence of flow)
As soon as the CH is called and the room thermostat kicks in, the boiler fires up. The hot water then works without issue, until the next time, usually at some point in the next few days or typically in the evening when I want a shower. Even if I switch the CH off as soon as the boiler has fired up, the hot water will generally function for the rest of the day without the CH being on.
The pressure in the system when cold is 1.5 bar and remains steady and all radiators have been bled of air when the CH has been on for a good while.
I have had one heating engineer out to service the boiler who identified an issue with the Ignition PCB which was a hairline crack and visible electricity/plasma in that hairline crack so that has been replaced. Unfortunately, the issue is persisting and due to timing, I have so far been out of luck with the issue happening when a heating engineer is not otherwise engaged on another job.
I have been told that the pump appears to be strong so should not be causing the problem. I have also been told that it may be worth flushing the CH system with a chemical and then refilling and also using an inhibitor as it could be caused by sludge in the system. I have also been told it could be the "primary flow switch", however I see no mention of a primary flow switch on this boiler, just a CH and DHW switch. I appreciate these suggestions may fix the problem (I am certainly not an expert), but after spending on the Ignition PCB, I really want to only spend on what is highly likely to be the problem.
I have read various other posts on the forum but they do not appear to be as infrequent and unpredictable as the issue I am facing. I would be happy to pay for a new boiler, after all it is a good 15 years old now, however I have recently sold my house, before this problem started and the price for the house does not factor in a brand new boiler.
I have also read some mixed responses regarding the divertor valve, does this sound like the culprit?
If anyone has experienced this problem before I would greatly welcome your comments
Cheers
I have an Ideal Mini C28 / re-badged Biasi boiler. There is an intermittent issue whereby at random points I get no hot water from the boiler, unless the central heating is on.
I have read through the diagnostics section of the manual and located the dipswitch to aid in fault diagnosis. The boiler appears to be the older type, with two PCBs and 3 LEDs and when the boiler is in the fault condition, the LED on the left is blinking green very fast, the middle LED is solid red and the LED on the right is off. The manual states the following error code:
Faulty primary circuit
(no water or absence of flow)
As soon as the CH is called and the room thermostat kicks in, the boiler fires up. The hot water then works without issue, until the next time, usually at some point in the next few days or typically in the evening when I want a shower. Even if I switch the CH off as soon as the boiler has fired up, the hot water will generally function for the rest of the day without the CH being on.
The pressure in the system when cold is 1.5 bar and remains steady and all radiators have been bled of air when the CH has been on for a good while.
I have had one heating engineer out to service the boiler who identified an issue with the Ignition PCB which was a hairline crack and visible electricity/plasma in that hairline crack so that has been replaced. Unfortunately, the issue is persisting and due to timing, I have so far been out of luck with the issue happening when a heating engineer is not otherwise engaged on another job.
I have been told that the pump appears to be strong so should not be causing the problem. I have also been told that it may be worth flushing the CH system with a chemical and then refilling and also using an inhibitor as it could be caused by sludge in the system. I have also been told it could be the "primary flow switch", however I see no mention of a primary flow switch on this boiler, just a CH and DHW switch. I appreciate these suggestions may fix the problem (I am certainly not an expert), but after spending on the Ignition PCB, I really want to only spend on what is highly likely to be the problem.
I have read various other posts on the forum but they do not appear to be as infrequent and unpredictable as the issue I am facing. I would be happy to pay for a new boiler, after all it is a good 15 years old now, however I have recently sold my house, before this problem started and the price for the house does not factor in a brand new boiler.
I have also read some mixed responses regarding the divertor valve, does this sound like the culprit?
If anyone has experienced this problem before I would greatly welcome your comments
Cheers