What r3 Means
r3 on a Bosch French door refrigerator is the fresh food side equivalent of the freezer defrost failure: the defrost cycle for that evaporator ran to its fifty-minute limit without the coil reaching the temperature that ends it. The repair manual's check point is the resistance of the fridge defrost heater, which is assembled with that evaporator.
Common Causes of r3
- Fresh food defrost heater failed open
- Defrost circuit thermostat or fuse open
- Damaged heater wiring at the evaporator
🔧 One Safe Check You Can Try
Note whether the fresh food compartment has been gradually losing its chill over days while the freezer seems unaffected, and whether the crisper drawers have water pooling under them. Both point the same way this code does.
⚠ Why You Shouldn't Go Further Than That
- This evaporator sits behind an interior panel that is fixed against refrigerant tubing, where a slipped screwdriver creates a leak.
- The measurement is a resistance reading on a heater circuit that must be fully isolated before anything is touched.
- Interior panels become brittle when cold and crack rather than flex, and a cracked panel does not seal the air path afterwards.
- Pooling water under the crispers often means the drain is also iced, which is a second job that needs doing at the same time.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.