The short answer for this family
On the Criterion CTMR refrigerator family a cabinet that runs without holding temperature is an airflow and heat-rejection problem far more often than a dead compressor, because a single evaporator behind the freezer rear panel, serving both compartments is what this platform puts in the cold path. Only the last of the ranked causes below is outside owner territory. Check your own code against the 20 in the table below.
What owners of these models actually see
- Food at the front is soft while food at the back is hard — A split across the shelves says cold is being made but not distributed, which here is the duct and damper between the two compartments.
- The cabinet is warm and the compressor is clearly running — You hear the compressor and the cabinet still drifts up. That combination points into the cold path, not at the compressor.
- Frost has built into a sheet where it is normally a dusting — Look at the rear panel of the freezer compartment. A hard white blanket there is insulation, and it stops this cabinet cooling long before it stops it running.
- NEAR MISS: the cabinet is silent and nothing runs at all — Silence is a power, start-relay or control fault, diagnosed in a different order. Start there instead of here.
What it usually turns out to be here
- A defrost cycle that has stalled rather than failed outright — First wherever this family is frost-free: automatic, with a defrost heater and a terminator clamped on the evaporator: the classic failure is a stalled defrost rather than a dead compressor. Ice builds over weeks, so the owner meets a warm cabinet rather than a frozen evaporator.
- The evaporator fan has failed or is being stopped by ice — Second, because one fan pushes freezer air down a duct into the fresh-food compartment past a damper, so a freezer-side blockage warms the food compartment first. A stopped fan gives a warm cabinet without the frost sheet the defrost fault leaves behind, and that is what separates the two.
- Blocked condenser airflow or a dirty condenser coil — Ranked here by how this cabinet breathes: the condenser sits at the back or underneath and needs clear air on both sides of it. Heat that cannot leave comes back as a cabinet that will not pull down.
- A control, thermostat or damper that is calling wrongly — Ranked here because on this layout the damper between the freezer and the fresh-food compartment decides how much cold the food space gets, so a damper stuck shut warms one compartment and leaves the other correct. Worth checking before anyone opens a sealed system, and after the mechanical causes above.
The checking order on these models
- Confirm the cabinet is actually running — Listen at the back for the compressor and feel the condenser for heat. A cabinet not running at all is a different page. Confirm your own model against the table first.
- Look at the cold surface for a frost blanket — Open up and look at the rear panel of the freezer compartment. Frost turned into a solid sheet is the cause, not a side effect, and it decides everything after it.
- Listen for the evaporator fan with the door held closed by hand — Press the door switch in and listen. A silent fan and a frosted coil point at different causes and want different parts.
Before any panel comes off
Safety
Unplug the appliance or switch off its breaker before removing any panel; a capacitor can hold a charge after the power is off. Do not tape the door switch shut and walk away, and do not open, cut or braze any part of the sealed refrigerant circuit: that is licensed work. A refrigerator holds food safely at 40 °F (4 °C) or below and a freezer at 0 °F (-18 °C) or below, so move perishable food out while you work.
Models in the CTMR family
Reference| Model number | Family key |
|---|---|
| CTMR101C1* | criterion:refrigerator:ctmr |
| CTMR142C1B | criterion:refrigerator:ctmr |
| CTMR142C1S | criterion:refrigerator:ctmr |
| CTMR142C1W | criterion:refrigerator:ctmr |
| CTMR142M1* | criterion:refrigerator:ctmr |
| CTMR180H1B | criterion:refrigerator:ctmr |
| CTMR180H1S | criterion:refrigerator:ctmr |
| CTMR180H1W | criterion:refrigerator:ctmr |
| CTMR180M1B* | criterion:refrigerator:ctmr |
| CTMR180M1S* | criterion:refrigerator:ctmr |
| CTMR180M1W* | criterion:refrigerator:ctmr |
| CTMR182*** | criterion:refrigerator:ctmr |
| CTMR183**#* | criterion:refrigerator:ctmr |
| CTMR205M** | criterion:refrigerator:ctmr |
| CTMR205M1* | criterion:refrigerator:ctmr |
| CTMR208*** | criterion:refrigerator:ctmr |
| CTMR73C1* | criterion:refrigerator:ctmr |
| CTMR74C1B | criterion:refrigerator:ctmr |
| CTMR74C1S | criterion:refrigerator:ctmr |
| CTMR74C1W | criterion:refrigerator:ctmr |
When this stops being owner work
The split on these models is not subtle. Call once the airflow checks are clean, because what is left on this family is the sealed system and the control board, and neither is an owner part. Call immediately for a burning smell, oil around the compressor, or a compressor that tries to start and cuts out every few minutes: oil outside the tubing means the circuit is open. On this platform the cabinet has to come away from the wall before most work can start, which is a two-person job on a loaded cabinet.
Other faults on these models
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
