Rheem Furnaces Troubleshooting

Rheem furnaces are a popular stuff to get. Especially it is connected with different kinds of business. What should you do if you face the error in its work? The worst thing to do is panicking. The troubleshooting guide given here is ready to fix the repair problems and return your favourite furnace to life. It has been checked by many users.

Rheem OBF Series Furnaces Troubleshooting

COMPLAINTCHECK FOR:
Odor, soot and smoky fire1. Insufficient combustion air
2. Lack of proper draft
3. Cracked/plugged heat exchanger
4. Burner not adjusted properly with combustion kit
5. Improper setting of barometric draft control
6. Oil leaks
7. Wrong nozzle size, or nozzle worn or partially clogged
8. Improper setting of electrodes
9. Plugged oil filter
10. Fuel pump cutoff valve not cutting off
11. Nozzle or electrodes improperly positioned
12. Leakage on return side of air distribution system
13. After drip, reflected heat, or impingement of flame
14. Improper or distorted end cone
15. Air leakage into oil pump supply line
16. Burner blower air inlet restricted or burner blower wheel dirty
17. Restricted flue
Delayed ignition1. Cracked, dirty or loose electrodes
2. Electrodes not properly adjusted
3. Incorrect nozzle
4. Improper primary air adjustment
5. Faulty ignition transformer
6. Water in fuel oil
7. Incorrect pump pressure
8. Furnace not properly set-up
9. Air leakage into oil supply line
Burner will not operate1. Open switch
2. Open fuse or circuit breaker
3. Burner motor overload open
4. Thermostat improperly set
5. Burner primary control safety open
Burner motor runs but does not (ire1. Oil supply insufficient
2. Faulty oil pump
3. Broken oil pump drive coupling
4. Coke deposits on electrodes
5. Air in oil supply line
6. Restricted oil supply line
7. Clogged nozzle
8. Restricted oil line filter
9. Leak in oil line
10. Failed ignition transformer
11. Electrodes not properly set
12. Dirty fire detector
Pulsations1. Improper nozzle
2. Inadequate draft
3. Air in oil line
4. Clogged flue
5. Furnace not properly set-up
6. Partially clogged pump strainer or oil line filter
7. Nozzle plugged
8. Nozzle too far forward in air tube
9. Barometric damper set wide open
Cad cell not functioning1. Requires direct view of flame
2. External light effecting cell operation
3. Remove cad cell and check with an ohmmeter:
a. With cad cell covered, the resistance should be over 100K ohms
b. With cad cell exposed to room light, the resistance should be under 1.5 K ohms
Low CO.’1. High draft through furnace
2. Improper primary air adjustment
3. Damaged combustion chamber
4. Faulty nozzle
5. Incorrect oil pressure
6. Draft regulator improperly set
7. Incorrect fuel/air mixture
High stack temperatures1. Damaged combustion chamber
2. Furnace not set-up with combustion kit
3. Undersized return air
4. Overfired furnace
5. Dirty heat exchanger
6. High draft, barometric damper not properly set
7. Excessive temperature rise
8. Air shutter adjustment open too much.
High smoke reading1. Lack of combustion air
2. Inadequate overfire draft
3. Incorrect oil pressure
4. Dirty burner blower wheel
5. Incorrect nozzle
6. Faulty oil pump
Burner motor runs but does not fire7. Dirty oil
8. Burner motor not obtaining full speed
9. Damaged combustion chamber
10. Flame impingement
11. Incorrect fuel/air mixture
Poor draft - overfire and stack1. Improperly sized chimney or not enough chimney height
2. Holes or cracks in chimney
3. Restricted chimney
4. Too many 90 degree elbows in vent pipe
5. Outside chimney too cool
6. Cool flue gases
7. Barometric damper not properly set, sticking or in wrong location
8. Oil furnace and fireplace chimney interconnected
9. Heat exchanger passages plugged
10. Overfired furnace
11. Improper air shutter adjustment
Noisy Operation1. Bad coupling alignment
2. Air in oil supply line (use only good flare fittings)
3. Tank hum on two-pipe system and inside tank

Rheem 96V Series Furnaces Troubleshooting

CODE DISPLAYED AT DUAL SEVEN- SEGMENT DISPLAY OF CONTROLDESCRIPTION
0This code is displayed anytime there is no fault present and no thermostat call present. The furnace is idle
H or hThis code is displayed anytime there is a call for qas heat. The lower-case "h" is displayed when the thermostat is requesting low gas heat and the upper-case "H" is displayed when the thermostat is requesting high-stage gas heat.
C or c This code is displayed anytime there is a call for cooling. The lower-case "c" is displayed when the thermostat is requesting low-stage cooling and the upper-case "C" is displayed when the thermostat is requesting high-stage cooling.
HP or hPThis code is displayed anytime there is a call for heat-pump heat. The lower-case "hP" is displayed when the thermostat is requesting low-stage heat-pump heat and the upper-case "HP" is displayed when the thermostat is requesting high stage heat-pump heat.
FThis code is displayed anytime there is a call for continuous fan from the thermostat
dFThis code indicates that the heat-pump is in defrost mode (dual-fuel systems only) and furnace is operating for defrost operation which is fixed at low-stage gas heating operation.
Cd or cdThis code indicates that there is a both cooling and dehumidication demand present at the same time. When de-humidification is active, the cooling airflow will be reduced in order to allow water to accumulate on the condenser thereby removing humidity from the conditioned environment. The lower-case "cd" is displayed when the thermostat is requesting low- cooling with de-humidification and the upper-case "Cd" is displayed when the thermostat is requesting high-stage cooling with de-humidification.

Rheem 802PA050314MSA Furnaces Troubleshooting

CODEDESCRIPTION
0Stand be
CCompressor on (coolinq or heat pump heat)
HHigh Gas heat on
hLow gas heat on
FContinuous fan on
101 Hour lockout
11Failed ignition
12Low flame sense
13Flame lost
14Unexpected flame
20Twinning fault
22Main limit open
26Line and Neutral reversed
33MRLC(Man. Reset limit cont.)(aka roll-out) open
44Low Pres. Switch Closed
46Low Pres. Switch Open, Indor on low Speed
45Low Pres. Switch Open, Indor on High Speed
55High Pres. Switch Closed
57High Pres. Switch Open
61Blower Fault - blower unable to run
93Internal control fault