Heat-pump water heater has no hot water: verify power, mode, setpoint, recent demand, filter and displayed error before assuming a compressor or element failure. Look at the display for the mode, the setpoint and any schedule. Wait the recovery time in the manual and check the tank temperature.
What this covers
- Residential heat-pump/hybrid electric water heaters
What it does not cover
Differential
Likely causes of “Heat-pump water heater has no hot water”, and how to tell them apart
- 1
The unit is in a mode, schedule or setpoint that limits heating
What separates it The unit is set to a vacation, an eco or a low setpoint mode, and the water is only lukewarm.
How to confirm Look at the display for the mode, the setpoint and any schedule.
- 2
Recent heavy demand has used the hot water
What separates it Hot water runs out after several showers or a laundry and recovers slowly.
How to confirm Wait the recovery time in the manual and check the tank temperature.
- 3
The filter or the airflow is blocked
What separates it The unit takes very long to heat, the fan is noisy and a filter alert shows.
How to confirm Clean the filter and check the clearance around the unit.
- 4
A power, element or compressor fault
What separates it The display shows an error, the breaker has tripped, or the unit does not start.
How to confirm Check the breaker once; a persistent error or a silent compressor needs service.
Before you touch a setting
Record this first — changing settings destroys the evidence
- The display, the mode, the setpoint and the tank temperature if shown.
- Recent hot-water use and the time it has been out.
- The breaker state and any error code.
Try in this order
0 of 4 completedCapture the exact state
ReversibleRecord display, mode, tank temperature, recent demand, breaker and fan/compressor sound.
Separate the likely fault domains
ReversibleCheck the approved filter and airflow clearance and compare recovery by documented mode.
Correct only the proven, accessible condition
ReversibleClean the filter and correct mode/schedule; use service for persistent codes, elements or refrigerant work.
Verify once before going farther
ReversibleAllow the documented recovery period and confirm safe fixture temperature.
Stop boundary
When this stops being a self-service repair
- !Use service for persistent codes, element or compressor faults, and do not open the electrical or refrigerant compartments.
- !Check the water at a fixture before use; a fixture with very hot water can scald.
Evidence ledger
Sources behind this answer
Exact questions
Common questions
Why does a heat pump water heater recover slowly?+
The heat pump heats more slowly than an electric element. Many units use the element as a backup when demand is high, depending on the mode.
Why does the heat-pump water heater give no hot water?+
It may be in a mode, tripped on a fault, have a power problem or a blocked filter.
Can it use the backup element?+
Many models have an electric element you can select as a temporary measure.
When do I call a plumber?+
If codes persist or the tank is leaking.