Baxi Bolier - Hot and Cold DHW Temperature Cycling Problem

Clicky · 23 Jul 2007

I have a Baxi Luna 310 Combi boiler. The temperature to the tap/shower fluctuates hot and cold. The burner fires and LED's light in sequence to "70". It then shuts off and cycles back to 30. (the water feels quite cold then). It fires up again and repeats the cycle. This has been occurring over the past 3-4 mo.

Just this morning I have a "30" and "60" flashing error and no hot water.

Does this sound like a sensor or Thermostat problem?

Any help would be appreciated.

Gasguru · 23 Jul 2007

The 60 flashing could indicate low system pressure or pump failure.

Is the boiler pressure about 1 Bar?

The 30 flashing may indicate flame failure - hold the on/off knob in the rest position for about 10 seconds and see if it resets. (check gas is on)

However the sequence you describe of the temperature fluctuating is often caused by a sludged up plate heat exchanger - do a search on the Potterton Performa which is a similar boiler. (The Luna badged version is not sold in the UK AFAIK)

clf-gas · 23 Jul 2007

Dont know the led seqence, but hope this will help.

http://www.radiantmax.com/downloads/baxi/baxiluna310_manual.pdf

Where in Canada are you?, Iam over there in October, St Cathrines, Ont.

Clicky · 23 Jul 2007

Thanks Guys.

My boiler pressure is about 1.5 bar.

The flame is still lighting. I will check the plate heat exchanger. The intake filter was clear.

Thanks for the manual. I have a copy, but am having trouble making heads and tails of it for trouble shooting. <must be written in the Queen's english...>

I am on the west coast: Vancouver, BC.

Gasguru · 23 Jul 2007

Just been checking the price of this boiler on the US web dealers. Their trade prices are more than TWICE the amount we pay in the UK. I hope they're more reliable than they are here for that money.

Clicky · 23 Jul 2007

I hope they're more reliable than they are here for that money

Nope...

Agile · 24 Jul 2007

Gasguru said:
Just been checking the price of this boiler on the US web dealers. Their trade prices are more than TWICE the amount we pay in the UK. I hope they're more reliable than they are here for that money.

Yes, but they have to fly them there on Virgin Atlantic !

I expect they are much more reliable because the canadian installers power flush the systems properly before fitting a boiler.

Tony

gas4you · 24 Jul 2007

And we don't

clf-gas · 24 Jul 2007

expect they are much more reliable because the canadian installers power flush the systems properly before fitting a boiler.

Most heating systems in Canada are warm air Tony, although I have seen a few wet ones, but they where P*ss*d up in a bar....

Baxmax · 24 Jul 2007

Baxi LOONEY 310...What next ?

Potterton Crackpot 830

Main Maniac 450

clf-gas · 24 Jul 2007

Baxmax said:
Baxi LOONEY 310...What next ?

Potterton Crackpot 830

Main Maniac 450

Agile · 24 Jul 2007

I have just been looking at the MI for this boiler.

It must be made for the canadian market because the MI are English on the left and Francais on the right!

Looks much like a Baxi 80 !!!

Tony

clf-gas · 24 Jul 2007

Agile said:
I have just been looking at the MI for this boiler.

It must be made for the canadian market because the MI are English on the left and Francais on the right!

Looks much like a Baxi 80 !!!

Tony

Your very astute Tony. Its French Canadian. Also they aint on sale anymore but you can find them on 't' interweb

Gasguru · 24 Jul 2007

I bet they fit the supply input filter components on the US/Canadian model pcb's with the class action lawsuits over there or perhaps not and Baxi got worried and dropped the model.

Bet Baxi's junk aly steamers aren't sold over there, US lawyers would put them out of business and do us all a favour.

The same old pre-mix Giannoni heat exchanger is used by some of the US boiler manufacturures though.

Baxmax · 24 Jul 2007

Post a photo,so we can all concur to what the "model" is.

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Baxi Bolier - Hot and Cold DHW Temperature Cycling Problem

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