The Rheem Furnace is a high-efficiency heating system designed for residential and commercial applications, featuring advanced combustion technology, variable-speed blower motors, diagnostic LED systems, and multiple safety controls. Below are key sections for safety procedures, technical specifications, troubleshooting, maintenance, and repair instructions.
Critical safety measures must be followed before performing any service or repair work on the furnace.
| Hazard | Precaution |
|---|---|
| Electrical Shock | Disconnect power at main breaker before servicing |
| Gas Leaks | Check for leaks with soap solution; never use open flame |
| Carbon Monoxide | Ensure proper ventilation; install CO detectors |
| Hot Surfaces | Allow furnace to cool completely before servicing |
| Moving Parts | Disconnect power before accessing blower assembly |
Key components: Burner assembly, heat exchanger, blower motor, gas valve, control board, igniter, flame sensor, pressure switches, and venting system.
WARNING! Only qualified technicians should perform repairs. Improper installation or repair can cause fire, explosion, or carbon monoxide poisoning.
Proper installation ensures safe and efficient operation.
CAUTION! Installation must comply with all local building codes and manufacturer specifications.
Understanding furnace controls and settings for proper operation.
Thermostat: Heat/Cool/Auto settings, fan control, temperature setpoints
Control Board: LED diagnostic lights, dip switch settings, reset button
Gas Valve: Manual shutoff, pressure regulator, solenoid operation
Blower Control: Speed taps, delay settings, continuous fan operation
Sequence of Operation: Thermostat call for heat → inducer motor starts → pressure switch proves draft → hot surface igniter glows → gas valve opens → flame sensor confirms ignition → blower starts after heat exchanger warms
Systematic approach to identifying furnace problems.
Tip: Always start diagnostics with the simplest possibilities first.
Frequently performed repairs and replacement procedures.
WARNING! Always verify repair with proper testing before returning unit to service.
Regular maintenance ensures optimal performance and longevity.
| Frequency | Maintenance Task |
|---|---|
| Monthly | Check air filter; replace if dirty |
| Seasonal | Inspect vent system; clean flame sensor |
| Annual | Professional inspection and cleaning |
| Every 2-3 Years | Complete system cleaning and calibration |
Common error codes and their meanings for Rheem furnaces.
| LED Flash Pattern | Error Code | Description |
|---|---|---|
| 1 Flash | Pressure Switch Error | Check venting and pressure switch |
| 2 Flashes | Ignition Failure | Check gas supply and igniter |
| 3 Flashes | Flame Loss Error | Clean flame sensor |
| 4 Flashes | Limit Switch Lockout | Check airflow and filters |
| 5 Flashes | Rollout Switch Error | Inspect heat exchanger |
| 7 Flashes | Blower Error | Check blower motor and capacitor |
Proper procedures for replacing critical furnace components.
Authorized Parts: Use only Rheem-approved replacement parts
Warranty: Unauthorized parts may void manufacturer warranty
Availability: Contact Rheem distributor or authorized dealer
Cross-Reference: Verify part numbers match original specifications
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Furnace won't start | Power loss, thermostat issue | Check circuit breaker, thermostat settings and wiring |
| No heat | Gas supply, igniter failure | Verify gas valve open, check igniter for continuity |
| Short cycling | Dirty filter, limit switch | Replace air filter, check limit switch operation |
| Blower won't stop | Thermostat fan setting | Check thermostat fan setting (Auto/On) |
| Unusual noises | Loose components, bearing wear | Inspect blower assembly, tighten mounting hardware |
| Pilot outage (standing pilot) | Draft, thermocouple | Check draft hood, replace thermocouple if weak |
Reset Procedure: Power off for 30 seconds, then restore power
Technical Support: 1-800-432-8373; www.rheem.com