All codes
Service call
SC557
Pressure temperature does not increase
AFusing
Level A — stop, SP reset after repair
First check
Same as 547/542 on the pressure side.
What it means
Pressure side never rises. Heater or thermistor.
Likely causes
- Heater
- Thermistor
- PSU
On-site steps
Parts to have on the truck
- Fusing unit
- PSU
Related codes
Confirm the subcode and part number in the FSM for this serial. Raicoh is a field companion, not a replacement for the book.