Ideal Isar HE 24

[denno4]

I have been having problems with the boiler firing up and bringing on the central heating to the radiators.
Last week someone came to it and fitted a new diverter which was ok for a few days but its now doing it again as im writing.
I rang Warm Front yesterday and they told me to find out what letter on the L.C.D. was being displayed.
This is easier said than done as it is just firing intermittently and for very short periods,and as the boiler is in the false roof it and I am 75 years of age it is a tad difficult to nail.
However with my head stuck through the hatch and a pair of binnoculars I saw it ignite this morning for a few minutes and then go back to displaying o. Whilst I was doing this it appeared to be displaying a letter t.
All the taps were turned off at this time and the rads started hotting up again.
You can get up at any time of the night and the rads although not fully hot are obviously being supplied by the boiler when everything should be off which if it cant be sorted is going to be expensive.

 

[gas4you]

The new Isars have frost protection built in, so as this is in your false loft space it could be this kicking in, especially if it has only happened recently.

'0' is the boiler at standby waiting for a command from the external room stat/timer to come on or a hot tap to be used. This is not a fault condition.

't' is the boiler activated on pre-heat to keep the plate HE warm to help with faster HW delivery.

'C' will be shown when on for CH and 'd' when a hot tap is on. Can't remember the letter for frost protection active .

The diverter could have been faulty, it is very common on these, but it could also be the frost protection kicking in.

Unfortunately as we all know, Warmfont and the associated cowboy companies and those that work for them, know nothing about the boilers they fit, or indeed how to fit them properly

 

[idealnumber1]

p for frost protection

 

[diverdee]

sounds like frost protection kicking in and preheat.both as should do. fit a pre heat dis kit and try lagging boiler plus pipes better.would love to hear from ideal re problems with latest ideal isar but as usual no comments

 

[Agile]

If its a more recently manufactured boiler then I think they have a built in facility to disable the DHW preheat.

I am surprised if the frost protection is significantly heating up the rads though. Most boilers only bring the system up to about 7° C for frost protection.

Tony

 

[idealnumber1]

the esprit can turn the pre-heat off

 

[denno4]

If its a more recently manufactured boiler then I think they have a built in facility to disable the DHW preheat.

I am surprised if the frost protection is significantly heating up the rads though. Most boilers only bring the system up to about 7° C for frost protection.

Tony

The engineer has been back and looked at the two frost traps but they are both sealed and couldnt be altered.
As I understand it at the moment some different ones have been ordered.
With regard to temperature they get a lot higher than 7 degrees. So warm in fact that if you get up in the night for the bathroom the whole bungalow is like a greenhouse. It seems like the central heating kicks in as soon as it gets to 2 degrees above freezing and goes to normal when it gets a bit warmer.
Thats even when the stat is at zero and the danfloss is in a non heating period or if you indeed turn it from auto to off.

I have got so peed off with waiting for them to sort it out, that the last two nights ive turned the main switch to the danfloss off which stops the rads coming on but then of course the frost stats and the boiler are completely off.
I then get out off bed when the radio alarm goes off at 7.am and switch the danfloss back on ready for the first heating period timed for 7.30 am.
What a performance for a brand new first winter use.
If I could wave a magic wand I would go back to the old Gloworm behind the fire and hot water without draining about 2 gallons off every time.
I think it safe to say that I am far from impressed and her indoors comments arent printable

 

[Agile]

I am wondering if this boiler is fited in an unheated area with a seperate frost stat which is activating as it gets cold.

Then it stays activated because its in an unheated place!

Tony

 

[diverdee]

does it have a pipe stat fitted on the flow wired to the frost stat

 

[shambolic]

You all missed the fact he said it had a t in the display this is the pre heat and nothing to do with frost stats. An external frost stat would kick in and the boiler would have a c in display.
Could be a dripping tap or leak on domestic and excess heat being dissipated to rads. Really sounds like faulty div valve cartridge. Not head. I will need to check but I am almost positive there is no built in frost stat in isars.
The only way to turnoff pre heat is with an isar with built in programmer which is a different boiler and not recommended for 75 year old to go up into loft to change times etc

 

[kittedup]

If I could wave a magic wand I would go back to the old Gloworm behind the fire and hot water without draining about 2 gallons off every time.
I think it safe to say that I am far from impressed and her indoors comments arent printable

What a surprise another mis-sold combi stuck in the loft of a pensioner....

 

[idealnumber1]

You all missed the fact he said it had a t in the display this is the pre heat and nothing to do with frost stats. An external frost stat would kick in and the boiler would have a c in display.
Could be a dripping tap or leak on domestic and excess heat being dissipated to rads. Really sounds like faulty div valve cartridge. Not head. I will need to check but I am almost positive there is no built in frost stat in isars.
The only way to turnoff pre heat is with an isar with built in programmer which is a different boiler and not recommended for 75 year old to go up into loft to change times etc

if it was a dripping tap or leak d with a flashing burner light would be on the display

 

[heatingman]

The man said it had a "t" in the display, which tells me its in pre-heat. The other big clue/s are warmfront and bbu. Its been installed onto an old system which they ain't cleaned. There is now muck & bullets jamming up the DV, they probaly only replaced the front hence reoccurence. It will quite happily run for hours trying to heat itself up sufficiently to satisfy pre-heat.

 

[denno4]

I am wondering if this boiler is fited in an unheated area with a seperate frost stat which is activating as it gets cold.

Then it stays activated because its in an unheated place!

Tony

I think you are on the right track Tony as it only seems to do this when its close to freezing.
If the sun gets out later in the day the rads start to cool down.

With hindsight im not impressed at the siting of the boiler in the loft,but I did not expect to be visiting it on a daily basis.
Regarding the various displays I have been up there once when it displayed t but most times its chugging away on c.
Twice yesterday the hot water went cold and it flashed intermittent H 2
which according to the manual is Control Thermistor Return Error and if after checking that the values are correct the prob may be the P.C.B.
This can be corrected by switching the power off for a minute and then back on.

Someone mentioned about connecting up to existing pipework on replacement which is exactly what they did, and the engineer that changed the diverter a month ago showed me the gunge that was in his bucket and said he was going to reccomend that system be flushed.
All in all its a bloody nightmare and I feel like telling them to rip the bloody lot out, but most of the cost was government funded and I paid about £600 so I dont no how I stand. Maybe a letter to Watchdog

 

[potterton678]

I have been having problems with the boiler firing up and bringing on the central heating to the radiators.
Last week someone came to it and fitted a new diverter which was ok for a few days but its now doing it again as im writing.
I rang Warm Front yesterday and they told me to find out what letter on the L.C.D. was being displayed.
This is easier said than done as it is just firing intermittently and for very short periods,and as the boiler is in the false roof it and I am 75 years of age it is a tad difficult to nail.
However with my head stuck through the hatch and a pair of binnoculars I saw it ignite this morning for a few minutes and then go back to displaying o. Whilst I was doing this it appeared to be displaying a letter t.
All the taps were turned off at this time and the rads started hotting up again.
You can get up at any time of the night and the rads although not fully hot are obviously being supplied by the boiler when everything should be off which if it cant be sorted is going to be expensive.

Did you get it sorted?