The short answer for this family
On the Alliance FDG family, a dryer that will not start at all is usually the door switch or catch. Heat on this build is a gas burner that must prove ignition every cycle, so the fault is far more often a failed light-off than a failed heater. The brand-generic article for this symptom ranks the supply and the start circuit first; on this platform it does not. The checks at the head of the ranking cost nothing but time; the cause at its foot is not owner work at any stage.
What you observe on these models
- Which of the family's models you are standing in front of — The matrix on this page is one masked production model, so the whole family is one build, and that is worth reading first, because heat on this build is a gas burner that must prove ignition every cycle, so the fault is far more often a failed light-off than a failed heater.
- Nothing at all happens when the cycle is started — No panel light, no click, no motor: that points at the supply rather than at the machine.
- The panel lights but nothing turns — Power is arriving. The fault is in the start circuit, the door circuit or the motor.
- It hums and does not turn — The motor is being asked to run and cannot. That is a seized drive or a motor on the point of failing.
Causes, most likely first on the FDG family
- The door switch or catch — Ranked first because heat on this build is a gas burner that must prove ignition every cycle, so the fault is far more often a failed light-off than a failed heater.
- The supply and the start circuit — Second. The burner assembly is behind the lower front panel, with the valve coils and igniter on the same bracket, so the cord and its terminal block are reachable and are where a heavy-current connection loosens.
- A motor on thermal overload — Third. The tell is timing: it will not start now and it starts an hour later.
- A broken or slipping drive belt — Fourth. Confirmed in seconds by hand, which is why it sits above anything needing a panel off.
- The cycle control, timer or moisture sensor — Last before a service call. Suspect the control once the airflow and the heat path are proven.
- Body: This is not the brand-generic ranking. The door switch or catch moves to the top of this family's ranking and the supply and the start circuit goes down to second place, because the platform here is a front-load cabinet whose heat is made by a gas burner with an igniter and a flame sensor.
Check in this order on these models
- Open and close the door firmly and listen for the click — No click, no cycle. The door circuit is in series with everything and the switch takes every slam the door gets.
- Confirm the machine has its supply — Test the outlet with something else, and check the breaker. A large appliance circuit can trip one side and leave the panel looking alive.
- Leave it an hour and try again — A motor that has cut out on its own protector will start again once it has cooled, and that alone identifies the fault.
- Turn the drum by hand with the power off — A drum that spins free and weightless has no belt on it. A drum that will not turn at all is seized.
- Body: The order follows the ranking, and the access decides the rest: on these models the burner assembly is behind the lower front panel, with the valve coils and igniter on the same bracket.
Before you open anything
Safety
Unplug the appliance or switch off its breaker before removing any panel or reaching into the drive area; a capacitor can hold a charge after the power is off. Do not reset a breaker repeatedly: a breaker that trips again is reporting a fault, not misbehaving. On a gas build, close the appliance gas valve before any work inside the cabinet.
Models in the FDG family
Reference| Model number | Family key |
|---|---|
| FDG4Z***115T*** | alliance:dryer:fdg |
Where the owner limit falls on these models
Call when the supply is proven, the door clicks, the drum turns freely by hand and it still will not start. Call promptly if the breaker trips whenever the machine is started, or if the machine hums without turning: both are faults that get worse rather than better with use.
Other symptoms covered for this family
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
