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F28 Error on 5 year old Vaillant Ecomax 828/2E boiler?

My boiler has packed up and is indicating an F28 error. It looks like the air intake pipe has melted (what would cause that?), which I have now removed. I've ordered a replacement, but thought given that it's only a air intake pipe, once removed, the boiler should fire up. However It's still coming up with an F28 error.

What might be wrong?

Thank you in anticipation for your help.

Den

Den
November 2008

Vaillant Heating, Home Heating Systems F28 Error Boiler

My Ecomax 828 has went exactly the same. First noticed a slight pop/bang when boiler ignited. Probably due to delayed ignition but otherwise then worked OK.
Then last week our CO alarm activated. Checked the cooker and lounge fire.The last thing I expected was the room sealed boiler.
Found the air inlet had melted. Some fixing nuts on the burner cover had worked loose due to the gasket disintegrating. Extremely dangerous and appalling Valliant have not made this design fault public.
Will be reporting this to the HSE.

Peter McGlone
November 2013

Just to add mine was no gas ceck you got credit on your boiler

james
February 2011

We were getting this on our Vaillant Eco Tec Plus boiler. As it was so cold, the water was freezing in the plastic outlet pipe. Disconnected the pipe so that the water dispenses in a bucket (i.e. so that it doesn't even need to go outside) boiler worked fine the next morning, but not straightaway I have to say. Bucket is a temporary measure of course.

Preet
December 2010

I have just encountered the same problem, hopefully now it has been sorted.
The problem was a design fault with the silicone gasket around the burner cover that disintegrates and has been replaced by a graphite one. The only problem is that not only does the plastic air pipe melt but also the aforementioned burner cover warps and lets the intense heat escape.
There is a flange replacement set available for around £55 part no 88134. This requires immediate attention by a gas safe engineer as could be dangerous.

Wayne
November 2010

my boiler has f28 and i have no water coming out of my hot tap any ideas.

tammy
January 2010

Hi, Did you sort out the problem on your boiler?
Mine seems to have the same fault, intake pipe melted. It's still working ok though. Rob

Rob
May 2009

Maker manual F28

No gas
Insufficient gas
Incorrect gas valve adjustment
Boiler goes to lock out Electrode defective
Ignition lead defect
Electronic igniter defective
Check air inlet duct

a
November 2008