Table of Contents
Replacing the HWH Mercury Level Sensor with an Electronic Sensor
The original level sensor is located “somewhere” inside the coach, normally fastened to the floor under a cabinet / sofa. The original unit used mercury to sense when coach was not level.
The new sensor will be relocated to one of the storage bays, somewhat centered between the front & rear axles and to one side of the bay's ceiling. You want to place it where you can make adjustments without “rocking” the coach and allow you to easily connect its harness into the HWH control module.
Installation Steps
HWH parts needed
Note: RAP91734 is for a 600 Series (and several others), Touch Panel. Check with HWH for the correct harness conversion cable for your control unit 500/510/600/610/680/2000 could use a different cable.
| Part Number | Cost | Description |
|---|---|---|
| RAP30618 (AP30618) | $541.30 | SNSR LE ESU-P 9“ A / Level Sensor |
| RAP29299 (AP29299) | $16.94 | HDWE KIT ESU-PTD / Hardware Kit |
| RAP91734 | $141.82 | SNSR LE MSU TO ESU CONV / HARNESS CONVERSION KIT |
| $700.06 |
Basic Steps
- Run cable to HWH control box
- Unplug original mechanical mercury sensor
- Plug in new sensor
- Power source needed for new sensor comes from small bolt within HWH control box
- Initial one-time adjustment is simple