Dometic · FreshJet FJZ rooftop air conditioners
E7Outdoor temperature sensor fault
The rooftop unit cannot read its outdoor-temperature sensor reliably.
What it means
Plain-English answer
Outdoor temperature information is used by the control logic, particularly on heat-pump models. Dometic directs E7 to authorized service.
Owner-safe checks
What to check first
- 01
Record the outdoor conditions and operating mode.
- 02
Turn the HVAC system off and perform one normal power cycle.
- 03
Confirm rooftop intake areas are not covered by snow or debris from ground level.
Safety boundary
Stop and call a technician when
- Do not bypass the outdoor sensor.
- The code returns after the power cycle.
Primary reference
Check the exact manual
Applicability: FreshJet FJZ rooftop air conditioners. The data plate and specification letter determine which procedure is correct.
Open Dometic FreshJet FJZ operating manual ↗Source reviewed August 2026