Rheem Error Code A093: PCB Data Error
Warning: Your Rheem HVAC system has detected a PCB data error, which requires professional attention to prevent further damage.
How to Fix Rheem Code A093
- Step 1: Turn off your HVAC system at the thermostat and the main power switch.
- Step 2: Contact a professional HVAC technician to diagnose and repair the issue.
- Step 3: Do not attempt to reset the system or perform any repairs yourself, as this could cause further damage or create a safety hazard.
How to Reset Rheem Code A093
- Turn off the unit using the power button on the front panel.
- Turn off the gas supply valve.
- Turn off the circuit breaker supplying power to the unit. Wait 30 seconds.
- Restore power at the breaker, then open the gas valve.
- Turn the unit back on. If the error returns, the underlying issue needs repair.
Resetting clears the code from the display but does not fix the underlying fault. If the code returns after reset, proceed to the diagnostic steps above.
What Does Rheem Error Code A093 Mean?
The A093 error code on your Rheem HVAC system indicates a problem with the data being read from the printed circuit board (PCB). This could be due to a faulty sensor, a broken wire, or a problem with the PCB itself. The system has locked out to prevent any further issues, and you'll need to reset it after the problem has been fixed.
Common Causes
- Faulty temperature or pressure sensor
- Broken wire or poor connection
- Damaged printed circuit board (PCB)
Diagnostic Steps
| If... | Check | Expected |
|---|---|---|
| System shows A093 error on display | Inspect all sensor wires and connections for any signs of damage or poor connections | Clean and secure connections with no visible damage |
| Sensor wires are intact | Test the sensor using a multimeter to ensure it's functioning correctly | Sensor readings within the manufacturer's specified range |
Applicable Rheem Models
- NCB(gas)
- NPE(electric)
- R801T(gas)
- R92E(electric)
- R92V(gas)
- RGE(gas)
- RH2T(electric)
- RNC(dual_fuel)
- RNE(electric)
- RNG(gas)
- RP16(electric)
- RPB(gas)
- RTGH(gas)
- Rheem Classic(gas)
- Rheem Classic 80 Plus(gas)
- Rheem Classic 80% Gas Furnace(gas)
- Rheem Classic 90 Plus(gas)
- Rheem Classic Plus Series(gas)
- Rheem Classic Series(dual_fuel)
- Rheem Prestige(gas)
- Rheem Prestige 95% Gas Furnace(gas)
- Rheem Prestige Series(gas)
Replacement Parts
| Part | OEM Number | Est. Cost | Where to Buy |
|---|---|---|---|
| Temperature Sensor | RHEEM-123456 | — | Find Part |
| Pressure Sensor | RHEEM-654321 | — | Find Part |
Related Codes on Same Models
Other codes that affect the same Rheem model families as A093.
| Code | Description | Severity |
|---|---|---|
| A001 | Ignition Failure | Warning |
| A021 | Over-Temperature | Warning |
| A031 | Inlet Thermistor Open/Short | Warning |
| A041 | Outlet Thermistor Open/Short | Warning |
| A043 | Water Level Error | Warning |
| A051 | Fan Motor Abnormality | Warning |
| A052 | Fan Motor Speed Error | Warning |
| A053 | Fan Motor Open Circuit | Warning |
| A054 | Fan Motor Overcurrent | Warning |
| A055 | Fan Motor Locked | Warning |