Home / Error codes / Water heater / 1L
Rheem water heater error 1L
Scale build-up. Limescale has built up in the heat exchanger.
Moderate · needs a technician
1L
Meaning: Scale build-up
What causes 1L
Limescale has built up in the heat exchanger.
What to do
The unit needs a descaling flush.
Can I fix it myself?
Not really. The part involved has to be tested with a meter and usually replaced.
If the code comes back
Book a visit and add the code to the booking. A technician arrives knowing which parts to bring, diagnoses the water heater for a flat $89 and gives you an exact quote before doing any work.
Same water heater