Food spoiling faster than usual, a refrigerator that feels warm on one shelf and freezing on another, or a control dial that no longer seems to change anything — these are the temperature-control complaints we hear most from St Johns, where a good share of the refrigerators in service are older units inherited by whoever's renting the space this year.
Temperature control problems are less obvious than a refrigerator that stops running entirely, which is exactly why they tend to go unresolved for a while in St Johns' rental-heavy housing stock — a unit that's running a few degrees warm doesn't announce itself the way a dead compressor does. The usual suspects are a failed temperature sensor (thermistor), a control board that's no longer reading the sensor correctly, or a thermostat that's been bumped out of calibration. We test each component individually rather than replacing the whole control assembly on a guess, since a $30 sensor and a $150 control board produce nearly identical symptoms from the outside.
Isolating the sensor, board, or thermostat before replacing anything.
Testing the temperature sensor readings against actual interior conditions.
Checking whether the board is correctly interpreting sensor input and driving the compressor.
Confirming the compressor cycles on and off at the temperatures the thermostat is set for.
A refrigerator that's running a few degrees warm doesn't look broken, which is why these calls sometimes come in after food has already started spoiling faster than expected. The sooner it's checked, the less food is at risk, so a thermostat or sensor issue is worth scheduling promptly rather than waiting to see if it gets worse on its own.
Uneven cooling often points to an airflow issue — a blocked vent inside the unit, food packed too tightly against the back wall, or a failing evaporator fan — rather than the thermostat itself. We check airflow alongside the sensor and control board, since replacing a working thermostat won't fix a blocked vent, and vice versa.
Straight answers — no clicking around.
Call Portland Refrigerator Repair to schedule a same-day or next-day diagnostic visit.
(888) 555-0123