New Truma heater clicks like a machine gun

[Fouldsy]

Hi Van Lovers

Okay its summer but on the first outing of the new member of the family, a swift 540 it was cold in the rain with all the windows open.....so time to try the new heater(well did not want to wait to November)

Heater set on blow air, about 2.5 on the speed dial...after 20 mins or so nice and warm...40 mins later enjoying the warm inner van there was a noise that sounded like a hand held drill reaching the tension and clicking, we thought a van had parked near by and some was putting down the corner steadies.

40-50 mins later another short burst of clicking...after a while the same again...at this point during the click I got up and found the sound was coming from the back of the heater.

During the evening I varied the speed and temp but the clicking continued very adhoc and different time spans from the occasional click to a machine gun.

The next day I tried using the heater for cold blow only and no clicks.

Now to take it back to the dealer at this stage would be a pain in the a**e, is it a hot metal bedding in thing or is likely to get worse...your thoughts would be much appreciated.

Apart from this the van is top banana.

F

 

[GStockton]

I recognise that noise you describe,What you will find it is Volt drop from the site mains,the noise is the relays chattering on the element control pcb at the back of the heater.

This usualy occurs when the site supply voltage drops down to about 200 volts.

I will put money on it that if you try it at home or another site it will be perfect.but don,t continue to use the heater whilst it is making that noise or you will need a new pcb.or at least the 3 element control relays replacing.I have mended quite a few of these pcb,s now. Glenn

 

[Fouldsy]

I recognise that noise you describe,What you will find it is Volt drop from the site mains,the noise is the relays chattering on the element control pcb at the back of the heater.

This usualy occurs when the site supply voltage drops down to about 200 volts.

I will put money on it that if you try it at home or another site it will be perfect.but don,t continue to use the heater whilst it is making that noise or you will need a new pcb.or at least the 3 element control relays replacing.I have mended quite a few of these pcb,s now. Glenn

Thanks for that, off to Clumber the weekend after next so will try it again.

F

 

[LumpyCBR1137XX]

I recognise that noise you describe,What you will find it is Volt drop from the site mains,the noise is the relays chattering on the element control pcb at the back of the heater.

This usualy occurs when the site supply voltage drops down to about 200 volts.

I will put money on it that if you try it at home or another site it will be perfect.but don,t continue to use the heater whilst it is making that noise or you will need a new pcb.or at least the 3 element control relays replacing.I have mended quite a few of these pcb,s now.

I recognise that noise you describe,What you will find it is Volt drop from the site mains,the noise is the relays chattering on the element control pcb at the back of the heater.

This usualy occurs when the site supply voltage drops down to about 200 volts.

I will put money on it that if you try it at home or another site it will be perfect.but don,t continue to use the heater whilst it is making that noise or you will need a new pcb.or at least the 3 element control relays replacing.I have mended quite a few of these pcb,s now. Glenn

I cannot agree at all. After reading this I bought a voltage monitor, as it made sense. The voltage never drops below 240v and it does it. I have just fitted a new board and it still does it. There is no positive indicator for why it does it, sometimes it does, sometimes not, but voltage is not the denominator in my case.
If the stat is left on full it does it sometimes, but if the stat is used to regulate it does it when the temperature is reached. Voltage drop made sense, hence buying the monitor, but unfortunately in my case it's not that.

 

[otherclive]

I cannot agree at all. After reading this I bought a voltage monitor, as it made sense. The voltage never drops below 240v and it does it. I have just fitted a new board and it still does it. There is no positive indicator for why it does it, sometimes it does, sometimes not, but voltage is not the denominator in my case.
If the stat is left on full it does it sometimes, but if the stat is used to regulate it does it when the temperature is reached. Voltage drop made sense, hence buying the monitor, but unfortunately in my case it's not that.

This thread hails from 2006. Is it a record?
However welcome to the Forum anyway.

 

[LumpyCBR1137XX]

This thread hails from 2006. Is it a record?
However welcome to the Forum anyway.

I know, but it came up on the search for resolution so had to point out the error in the prognosis. I've not come up with a resolution yet, and people still get the same issue and will search for it. I was considering borrowing a stable 240v PSU and trying that but the voltage monitor shows 240v min sometimes up to 250v. Lurked for a while so her now so can get involved a bit more

 

[Mel]

Hi and welcome to the forum. Glad you are going to post more, but please don’t resurrect threads that pushing 20 years old. Please start a new one instead.
I have locked this thread.
Thanks
Mel