Ruud ProTerra HVAC System Error Codes

High-Efficiency HVAC System. 15 error codes documented.

Severity breakdown: 6 critical , 9 warning

Error Codes

Code	Description	Severity
11	No Ignition	Critical
12	Flame Failure	Critical
13	Improper Combustion	Critical
14	Overheat / Thermal Fuse	Critical
51	Gas Valve Fault	Critical
99	Vent Blockage	Critical
15	Inlet Temp Sensor Fault	Warning
16	Outlet Temp Sensor Fault	Warning
21	Air Supply / Operational Switch	Warning
24	Flow Sensor Malfunction	Warning
29	Condensate Neutralizer Issue	Warning
31	Inlet Water Filter	Warning
33	Fan Motor Fault	Warning
61	Blower Motor Failure	Warning
76	Communication Fault	Warning

Cross-Reference: Shared Codes with Other Ruud Models

Model	Type	Shared Codes	Unique to That Model
Endeavor	—	15 / 15	—
Achiever Plus	—	15 / 15	—
Achiever	—	15 / 15	—
U97V	—	15 / 15	—
U96V	—	15 / 15	—
U80V	—	15 / 15	—
Professional Ultra	—	15 / 15	—
Professional	—	15 / 15	—
Performance Plus	—	15 / 15	—
Performance Platinum	—	15 / 15	—
Commercial	—	15 / 15	—