HVACopediaRheem · Furnace
58 Water sense circuit open
What the control is telling you
The electronic water level sensor circuit is open.
Applies to: R95P (R95PA040-115)
Likely causes
- Water level sensor unplugged or wire broken
- Faulty water level sensor
Test and repair steps
- Check the water level sensor connection at the collector box and its wiring back to the IFC.
- Repair broken or loose wiring.
- Replace the sensor if the circuit is still open. (Manual gives only the meaning; steps are from general sensor-circuit checks.)
Settings for these units
Clearance to combustibles (all models) · R95P
| Location | Minimum clearance |
|---|---|
| Left side | 0 in. |
| Right side | 0 in. |
| Back | 0 in. |
| Top | 1 in. |
| Front | 2 in. |
| Vent | 0 in. |
| Service (front) | 24 in. recommended |
Same values for R95PA040 through 115.
Column order read from a rotated drawing header - confirm on the furnace clearance label.
Models that show this code
6 models in R95P
Other codes on the same units
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Source: R95P: Diagnostics and Fault Codes table, p.87 (PDF p.91). Summarized in our own words; check the original manual for your model.
Homeowner looking at this code? See what it means for you and when to call a technician.
For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.