Rear waste water tank level sensor replacement ? (1 Viewer)

Oct 13, 2016
1,053
897
Grays - Essex - UK
Funster No
45,568
MH
Mercedes Hymer B680
Exp
Been moho’ing for a time now
Hi, I’ve got 2001 Mercedes Hymer B680, I’ve washed/flushed out the waste tank so many times but the level indicator generally reads full, even when I KNOW it’s empty, I assume the level sensor is kaput, but I can’t see where it is, or even a plate/trap to gain access to it, any ideas be greatly appreciated, TIA (y);) incidentally it has a rear transvers bed over the garage
 
Last edited:
Sep 17, 2017
5,591
10,456
Birmingham, UK
Funster No
50,575
MH
A-Class
Exp
2017
They are really unreliable. Ours is only a couple of years old and already gets stuck at 25%. Someone needs to invent a sensor that can survive grey water.
 
Upvote 0

Two on Tour

LIFE MEMBER
Sep 16, 2016
10,430
51,975
Near the junction of the A14 and A1, Cambs
Funster No
45,145
MH
Elddis Autoquest 175
Exp
Since 2010
They are really unreliable. Ours is only a couple of years old and already gets stuck at 25%. Someone needs to invent a sensor that can survive grey water.

If it's an underslung tank or have access to the underside of the tank then the Mopeka Tank Pro bluetooth/ultrasonic sensors work treat.

1665065621104.png
 
Upvote 0
Jul 6, 2018
204
324
North Yorkshire
Funster No
54,780
MH
burstner brevio t640
Exp
Since 2010
We had a Hymer B774 for 8 years, at least once a year I needed to remove the water tank lid and clean the probes. I used a kitchen scourer the ones that are foam with a green rough side. Use the rough side. That always cured ours …. For a while
 
Upvote 0
Oct 16, 2016
38
31
Birmingahm
Funster No
45,623
MH
Low Profile
Exp
Since 2010
I agree with Andy1954, in that our Swift has a cap underneath and I slide under, remove the cap and do the same once in a while to keep the probes free from gunk.

Subscribers  do not see these advertisements

 
Upvote 0
Jan 27, 2009
873
3,388
Leyland Lancs
Funster No
5,472
MH
A class
Exp
since 2001
I found the main fault on the Hymer type was the poor electrical/mechanical connections between the top of each stainless steel probe and its signal output wire. The connections just rely on the large blob of potting compound to hold the joints together, which it does initially.
 
Upvote 0

Lenny HB

LIFE MEMBER
Oct 18, 2007
54,013
152,241
On the coast in West Sussex
Funster No
658
MH
Hymer B678 DL
Exp
Since 2008 & many years tugging
Normally with Hymers it is mounted in the top of the tank as they use the probe type. Normally fairly closed to the inspection hatch.
 
Upvote 0
OP
OP
bigalw35
Oct 13, 2016
1,053
897
Grays - Essex - UK
Funster No
45,568
MH
Mercedes Hymer B680
Exp
Been moho’ing for a time now
Normally with Hymers it is mounted in the top of the tank as they use the probe type. Normally fairly closed to the inspection hatch.
Many thanks Lenny HB, the motorhome (Hymer B680) is a 2001 model, so I’m just looking at replacing the sender, but I don’t know where to look for it ?, any help would be appreciated
 
Upvote 0
Jan 8, 2013
8,496
11,538
Dronfield - Derbyshire
Funster No
24,202
MH
Burstner Lyseo 690G
Exp
Happy FLT since 2011
Many thanks Lenny HB, the motorhome (Hymer B680) is a 2001 model, so I’m just looking at replacing the sender, but I don’t know where to look for it ?, any help would be appreciated
Do you really need to know what level it's at.
Simply empty it when your water tank is getting empty or a soon as convenient.
A brand new one won't last very long either.

Subscribers  do not see these advertisements

 
Upvote 0
Jun 27, 2021
338
1,090
Lincolnshire, UK
Funster No
82,232
MH
PVC
Exp
Twelve months and still learning.
The level indicator on our Swift PVC worked briefly when we first bought it, then it stuck on half full for over eighteen months until yesterday, after coming home in torrential rain, it is now stuck on full. How is it we can smash an object into a relatively small rock in space but cannot design a decent water level indicator?
 
Upvote 0

Join us or log in to post a reply.

To join in you must be a member of MotorhomeFun

Join MotorhomeFun

Join us, it quick and easy!

Log in

Already a member? Log in here.

Latest journal entries

Funsters who are viewing this thread

Back
Top