Vaillant boiler noise problem.

[Gilesbo]

Vaillant boiler noise problem.

I have a Vaillant Eco Tech Plus 418. Installed in April 2008. Open vented system.

It was a no problem boiler until after this years service (£120.00), it has started to make noises.

When it modulates between 64 C and 61 C it whines on both heating and modulating down.

Then the burner goes off. After it cools down to 40 C. the burner turns on again and I have a pure tone while it warms up to 64 C.

The boiler is in the airing cupboard off my bedroom and as I have underfloor heating I get woken at 05.00 when the boiler starts. This didn't happen before the last service!

The service engineer says Vaillant Boilers used to be very good but they have gone down hill now. This is a usual problem. They have changed loads of parts in one Vaillant boiler recently by following the error codes and it still makes a noise. He said he could replace my April 2008 boiler with a better one.

“Which magazine” said it was the best.

I don't want to change my boiler.

Please can you help?

Gilesbo

 

[bobw1956]

get yourself a proper engineer who knows,about Vaillant boilers,

he,s talking a load of sh--

 

[petertheplumber12]

It sounds to me like the heat exchanger has a partial blockage, I could be wrong. Don't laugh, I use a doctors stethoscope to listen to boiler noises to establish the source of the noise and any half decent GSR would find the problem, and I don't care if you are in the middle of London £120 for a service is twice what it should be.

 

[Agile]

We normally expect a whine in certain boiler conditions to be a combustion related issue.

The test of that for the owner is to listen at the flue outlet and see if it particularly loud there.

I dont see how anyone can use a medical stethescope! They have a flat sensing surface about 50 mm diameter.

I use a specific mechanical stethescope with a 3 mm pin probe to listen for noisy parts in boilers!

Tony

 

[petertheplumber12]

We normally expect a whine in certain boiler conditions to be a combustion related issue.

The test of that for the owner is to listen at the flue outlet and see if it particularly loud there.

I dont see how anyone can use a medical stethescope! They have a flat sensing surface about 50 mm diameter.

I use a specific mechanical stethescope with a 3 mm pin probe to listen for noisy parts in boilers!

Tony

That's interesting tony I am not aware of the one you have I got mine about 15 yrs ago so haven't looked since.

 

[bell824]

fook the stthoscopes has no-one got a long screw driver anymore, stick on the part and stick your ear against it

 

[gaswizzard]

Talk about gullible.

 

[Agile]

The proper instrument gives a signal to both ears and the testing point is on a flexible tube so it can go where others cannot get to with their screwdrivers!

It also looks more professional as well.

Tony

 

[bell824]

never had a problem locating boiler noise with a screwdriver!!

if you are unable to narrow it down to a precise location with local testing of components that can be reached then i question how well you know the basic operating principles of the components and waterways!

seriously i would feel a fool bringing a scope out my toolkit and never has anyone been shocked at my primitave ear!

 

[petertheplumber12]

never had a problem locating boiler noise with a screwdriver!!

if you are unable to narrow it down to a precise location with local testing of components that can be reached then i question how well you know the basic operating principles of the components and waterways!

seriously i would feel a fool bringing a scope out my toolkit and never has anyone been shocked at my primitave ear!

When your hearing is less than 100% by quite a lot then you will understand the need for assisted listening. Also I have had more than one person say that I must take my job very seriously which is a good thing to hear isn't it?