What's This Noise?

[Folkranger]

Pitched up on site and have had this noise going for some hours. It's a regular fast continous squeek, squeek, squeek, squeek. It sounds like it's coming from around the heater area but is loudest under the van. It is running at about 200 beats per minute. It sounds like the farmer's field sprinkler, at first I thought it was, but it's coming from my van.

I've turned off mains, 12v, pump, gas and fridge. No difference
I've run taps, drained the heater, run the gas cooker, turned off the victron charger and retracted the Goldscmitt legs. Nothing changes!
I even wonder if there could be something underground, like a pump, but short of moving the van. I doubt it.

I realy don't want to go to bed tonight with this unsorted.

 

[Lenny HB]

Too hot for a Geordie.

Suffering in cold in Stratford at the moment a few Geordie's here, only 29° yesterday, freezing to day 26° might have to put a jumper on.

 

[Mechantech]

i Tag hidden somewhere ?
I’ve read they can alarm to notify others they are being tracked.
The ones on my dogs do regularly.

 

[Folkranger]

Well It's that noise again. Started when the temperature (Netherlands) went over 30 and went non stop for the next 2 days solid

The water heating hasn't ever been put on this time so I can't blame 'er indoors this time. It didn't even stop through the enight as the temp dropped to 25.

Now on third day pulled in in Germany after a long run and the temp is a comfortable 23 and the noise has stopped.
It seems likely to be the heater fan but seems more affeceted by the ambient temperature than the water temperature.

Correction: Just had another listen and it's going again (or had never stopped)

 

[Burgo]

Electric toothbrush? Any, ahem, "toys" you or your partner may have?

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[Folkranger]

Another thought one of the fans in the Truma Combi, the Combi is still powered when the 12v is off via a 10amp fuse in fuse bank beside the Elektroblock to the left of the EBL in mine looking at the front.

I've eventually pulled this fuse. Noise still going.

Yes it did, you should have pulled the 10 amp heater fuse last night then that would have ruled out one item or found the problem.
Don't tell me it was too late you kept me up long enough.

I've pulled out all 4 on this block. The 10A is for a sat dish. The bottom 2A is heater. The noise continues unabated.
I've also pulled a 10A fuse on the EBL marked "heater" Heizung) to no avail.

 

[Lenny HB]

I've eventually pulled this fuse. Noise still going.

I've pulled out all 4 on this block. The 10A is for a sat dish. The bottom 2A is heater. The noise continues unabated.

Time to buy a Stethoscope.

 

[Folkranger]

Time to buy a Stethoscope.

Ahh Lenny, I thought you were my stethoscope.

 

[Folkranger]

Seems to be coming from the waste water tank. Here's a recording inside the tank.

 

[L' Hobo]

Seems to be coming from the waste water tank. Here's a recording inside the tank.
View attachment 781987

That sounds like a pump of some description?

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[Folkranger]

And here's the connection that when disconnected stops it. It sits on top of the waste tank next to the harness for the waste tank sensor. Don't yet know what this is for. It disappears down the side of the waste tank.

 

[Lenny HB]

Could be the waste tank valve solenoid oscillating.

 

[OldCodger]

Do you have a fan on the fridge externals. I do and it runs when the external air is high! Take the covers off the exterior fridge vent(s) to check

 

[Minxy]

Have you got a waste water tank heater, ie to prevent it freezing? If so is it turned off?

 

[L' Hobo]

And here's the connection that when disconnected stops it. It sits on top of the waste tank next to the harness for the waste tank sensor. Don't yet know what this is for. It disappears down the side of the waste tank.
View attachment 781994View attachment 781995

Why not just disconnect it for a while and see what stops functioning. Then you will know where to start looking?

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[Lenny HB]

Have you got a waste water tank heater, ie to prevent it freezing? If so is it turned off?

Tank is heated by blow air system.

 

[Folkranger]

Why not just disconnect it for a while and see what stops functioning. Then you will know where to start looking?

I thought of that but were on the move and I don't know if it's a habitation thing or part of the vehicle which I wouldn't want to go awol on the autobahn. (probably not I know, but there again I don't know.)

 

[Folkranger]

Could be the waste tank valve solenoid oscillating.

Possibly. It seems to connect with the wast tank harness. Been oscillating for over a month now if it is.

 

[Minxy]

Tank is heated by blow air system.

Directed from the toilet cubicle no doubt!

 

[Manic]

Has it got an Electric dump valve and that’s not stopping at closed position.
Open valve and see if noise persist.

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[Landy Andy]

Id put a test bulb in its place, then go through fuse box, pulling fuses until it went out. Then see what the fuse was labeled as to give some indication as to its function.

 

[Folkranger]

It stopped yesterday and despite this heat wave hasn't yet returned. So I wonder what now isn't working if its burned out.
Don't think they're connected but one of the Goldschmitt levelling legs hasn't worked since yesterday. It is the one next to "the noise" but unless they have individual sensors and actuators there would only be hydraulics, not electrics at each leg.

 

[OldCodger]

Do you have the fridge fans I mentioned? They only come on when it’s hot

 

[L' Hobo]

It stopped yesterday and despite this heat wave hasn't yet returned. So I wonder what now isn't working if its burned out.
Don't think they're connected but one of the Goldschmitt levelling legs hasn't worked since yesterday. It is the one next to "the noise" but unless they have individual sensors and actuators there would only be hydraulics, not electrics at each leg.

Perhaps the noise could have been slightly leaking hydraulic pressure passing through a valve?

 

[Folkranger]

Do you have the fridge fans I mentioned? They only come on when it’s hot

Sorry. No. Internet connection's a bit iffy

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[Just smiffy]

It’s not a small macerater in the waste tank is it…?

 

[Folkranger]

It’s not a small macerater in the waste tank is it…?

No, she's in the kitchen making my lunch.

 

[Folkranger]

This is the hydraulic leg that's stopped working. Looks like a solenoid at the top of the leg. This leg is bolted to the chassis 6" away from the waste tank.

Can any of you electrical geeks identify this as a solenoid?
And could that have been the cause of the noise until it burnt out, stopping the leg from actuating.

 

[Folkranger]

Good news. I moved sites yesterday and the leveling leg started working again.
Bad news. That noise started up again last night.
Bad news. I lost my torch these last three days.
Good news. Found the torch on top of the underfloor waste water tank.
Bad news the torch was left on and the batteries are flat.

 

[L' Hobo]

Good news. I moved sites yesterday and the leveling leg started working again.
Bad news. That noise started up again last night.
Bad news. I lost my torch these last three days.
Good news. Found the torch on top of the underfloor waste water tank.
Bad news the torch was left on and the batteries are flat.

Good News, at last you now have a suspicion of where the noise is coming from. Bad News, you may have to take it back to the levelling leg place to be fixed & paid for?

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[Lenny HB]

If it is the solenoid on the leg doing it you should be able to feel it vibrating when it makes the noise.