Potterton Netaheat 'whoosh' on firing up.

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armyash

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Went to a job today.

Customer wanted a second opinion. Had another engineer round before me to do a LLC. He capped the meter off as the hob (built in to work top type) was fitted on bayonet hose and plugged in to old bayonet.

Also said the boiler was dangerous as when it fired up there was a whoosh sound and you could feel the pressure on the case as it fired up.

Pressure at meter was ok. Faulty gas valve?

Previous engineer had filled out warning notice but only recorded info about the hob, nothing about the boiler but said it needs replacing.

Any ideas what could be causing this 'whoosh'?
 
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That's what I thought at first until the customer said he had never really noticed that before. Called my boss to get his opinion and he said he thinks the gas valve might be faulty.
 
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I would turn on the gas, fire the old girl up see... Check the basics like burner pressures, gas rate & combustion performance... Good old boilers!
 
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Yeah we had a feeling most if not all parts are obsolete for these. Boss is giving a quote for a new boiler anyway. The bloke has just had the flat newly decorated with a new kitchen, don't think he was expecting to have to replace the boiler.
 
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armyash said:
Yeah we had a feeling most if not all parts are obsolete for these. Boss is giving a quote for a new boiler anyway. The bloke has just had the flat newly decorated with a new kitchen, don't think he was expecting to have to replace the boiler.
Click to expand...

That always amazes me, if the fridge, washing machine, cooker youre car etc etc was twenty years old. You can guarantee it would be noticed and replaced.
 
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Netaheats do tend to ignite like that. Remove the cover and have a look at the back of it. It will most likely be fine. The combustion chamber is behind another panel inside.

A bayonet on a hob isn't necessarily wrong. It depends on the mi's of the particular hob and how it has been fitted.
If no mi's available it would be fair to say its not allowed.
Either way he shouldn't have capped the meter off for that. Unplugging the bayonet and a signiture would have been enough (AR).
If they plug it back in again when you leave its not your problem. They are aware of the risk and make their own decision.
 
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The only thing hard to get is the old rodgers gas valve but you can still get them if you look around.

If it is the netaheat profile you can get everything for them.
 
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