Rheem’s classic 90-plus features, models, problems, and troubleshooting 

Do you want to know about the Rheem classic plus gas furnace features, resetting, problems, and troubleshooting? Then you are on the right page to learn all about it.

What is Rheem's classic 90 plus? 

Rheem is the top heating, ventilation, and air conditioner manufacturing company. The classic 90 plus is a highly efficient product certified by the Canadian Standards Association (CSA). It is easy to install and maintain. Its features include:

• Low energy consumption
• 90 percent efficiency rating in the annualized fuel utilization efficiency (AFUE)
• Dual aluminized steel heat exchanger 
• Stainless steel to prevent corrosion 
• Lightweight and easy to handle
• Side gas, electric, and condensate drainage connections the up-flow model.
• The integrated control board handles all operating functionalities. It provides hookups for humidifiers and electronic air cleaners.
• A pre-painted galvanized steel cabinet
• You can select indoor or outdoor combustion air.
• Transfer protection and control fuse protection
• 5-year parts warranty. 

List of classic 90 plus models: 

1. RGRA-04EMAES
2. RGRA-06EMAES
3. RGRA-09EZAJS
4. RGRA-10EZAJS
5. RGRA-12ERAJS
6. RGRB-07EMAES / RGRB-07EYBGS
7. RGTA-04EMAES
8. RGTA-06EMAES
9. RGTA-07EMAES / RGTA-07EYBGS
10. RGTA-09EZAJS
11. RGTA-10EZAJS
12. RGTA-12ERAJS

Buy all models of classic 90 plus from https://partshnc.com/. PartsHnC is a trusted seller of Rheem equipment parts. 

Common Rheem Furnace Problems and troubleshooting:

Note: 

• Before troubleshooting, switch off the power supply.
• Schedule the inspection for the long life of Rheem's classic 90-plus furnace 
• Clean filters regularly 
• Test the carbon monoxide
• Install smoke alarms 

Rheem furnace not starting:

Furnace's start problem occurs because of many reasons. Read the below article to find out why your furnace is not starting.

Power problem:

• Look at the thermostat battery is charged
• If the battery is discharged, then replace it 
• And then set the thermostat at heat, and the fan set on auto

The problem within the breaker box:

• Check your furnace breaker box
• Breaker is tripped
• It came to the middle position, then set it on and reset the breaker

Troubleshooting of pressure switch:

• Locate the furnace pressure switch on the side of the furnace.
• Make sure the switch is on
• Check your furnace has cut off. That prevents the furnace from running when the blower cover is open.
• Make sure that the cover is closed 

Solution for condensate pump problem:

• In a high-efficiency condenser, furnace water is created as a byproduct
• A condensate pump is used to remove extra water
• Pumps have an overflow of safety switches
• Check your condensate pump motor works properly and there is no blockage
• Clear blockage or call to service professional

Safety switches troubleshooting:

• When the furnace is running on power, then it is possible that the furnace is in a lockout
• Modern furnaces have many switches that shut down the furnace when it detects an unsafe condition
• Every time a lockout happens, the furnace will use flashing lights as color codes to identify the source of the shutdown
• This color code is unique to each model
• These color codes help to understand the problem
• If you do not understand, then inform professionals

Rheem furnace not heating:

Failed flame sensor or igniter may create problems in the furnace heating process.

Troubleshooting of flame sensor:

• Open the upper panel and remove it
• Remove the mounting screws with the help of long screwdrivers
• Pull out the flame sensor outside the burner bracket
• Disconnect the wire from a flame sensor
• Replace the old flame sensor with a new one
• Reconnect the wire to a new flame sensor
• Carefully position the flame sensor in the burner bracket
• Close the upper panel
• Start the power supply and check your furnace works correctly

Troubleshoot the ignitor: 

• Switch off the electric supply to the furnace
• Detach the upper and lower panel of the furnace
• Drag out the old ignitor from the mounting bracket
• Disconnect the wire from an ignitor
• Substitute the new ignitor 
• Fit the wire through the retainer
• Connect the terminal to the control board
• Close both the upper and lower panels
• Turn on the power supply to the furnace and observe the furnace works correctly.

Rheem furnace not working:

The furnace stops working when the control board is failed.  

To solve the control board issue:

• Turn off the power supply
• Slide-out the panels
• Take a photo of wiring connections
• Then disconnect the wires carefully
• Remove the old control board
• Install new control board
• Reconnect wires
• Close the panels of the furnace
• Check the furnace work

Why does the gas furnace not turn on with the air conditioner/ heat systems?

• Blue flame comes and shuts again 
• Because of dirty flame rod
• Mostly, the shutting problem comes because of dirt
• Turn off the electric supply
• Take out the panels
• Pull the flame rod out 
• Clean the flame
• Put it back in the same place
• Turn on the power switches 
• Check furnace flame is burning correctly or not

How do I reset my Rheem Classic 90 Plus? 

Almost every Rheem furnace has a reset button. For the following reasons, the reset button pops out.

• Loss of gas or oil
• Closed/ blocked gas values
• Overheating of furnace
• The dirty flame sensor rod
• Clogged air filters

Method to reset the Rheem furnace:

• Check if the pilot light is out
• Then turn down the thermostat temperature setup
• Switch off the circuit breaker
• Turn off the gas valve
• Turn back on the circuit breaker
• Turn back on the gas valve
• Press the reset button for 30 sec
• Set the thermostat to the desired temperature

All heating, ventilation, and air conditioning equipment are available at the PartsHnC website. For more information, contact us at [email protected] or call on (866) 963-0907.