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ruud furnace error codes

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ruud furnace error codes
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ruud furnace codes

If you are an owner of Ruud furnace or operate it at your work, you may encounter with Ruud furnace error codes appearing in the operation process. The tables on the page describe the codes, flashes, blinks and other problem signals and let you understand what is going on with the equipment at a certain moment.


Ruud R801T Furnace Error Code

CODE: 0.
RESULT: Standby.

CODE: C.
RESULT: Compressor on (cooling or heat-pump heat).

CODE: H.
RESULT: Gas heat on.

CODE: F.
RESULT: Continuous fan on.

CODE: 10.
RESULT: 1 hour lockout.

CODE: 11.
RESULT: Failed ignition.

CODE: 12.
RESULT: Low flame sense.

CODE: 13.
RESULT: Flame lost.

CODE: 14.
RESULT: Unexpected flame.

CODE: 20.
RESULT: Twinning fault.

CODE: 22.
RESULT: Main limit open.

CODE: 26.
RESULT: Line and neutral reversed.

CODE: 33.
RESULT: Mrlc (manual reset limit control) (aka roll-out) open.

CODE: 55.
RESULT: Pressure switch stuck closed when should be open.

CODE: 57.
RESULT: Press switch stuck open when should be closed.

CODE: 61.
RESULT: Blower fault-blower unable to run.

CODE: 93.
RESULT: Internal control fault.

Ruud U98V Furnace Error Code

FLAME LED: OFF.
RESULT: No flame is detected.

FLAME LED: Rapid blink.
RESULT: Unexpected flame.

FLAME LED: Slow blink.
RESULT: Marginal flame sense.

FLAME LED: Steady ON.
RESULT: Normal flame detected.

STATUS LED: Steady ON.
RESULT: Furnace.

STATUS LED: 1 Blink.
RESULT: Ignition failure, 1 HR lockout.
FIX: Reboot system.

STATUS LED: 2 Blinks.
RESULT: Pressure switch stuck open, switch will not close when inducer is on.
FIX: Try to manually close the switch, replace the switch, or check blowers and vents for air pressure.

STATUS LED: 3 Blinks.
RESULT: Limit switch open, main limit or roll out control
FIX: Check for a restricted air vent, loose blower wheel, a defective blower, or a dirty air filter.

STATUS LED: 4 Blinks.
RESULT: Pressure switch stuck closed, switch will not open.
FIX: Check for an obstruction in the pressure tubing.

STATUS LED: 5 Blinks.
RESULT: Not applicable.

STATUS LED: 6 Blinks.
RESULT: Line and neutral reversed.
FIX: Control board or the furnace's ground could be defective.

POWER LED: OFF.
RESULT: No power (24 VAC) to control board.

POWER LED: ON.
RESULT: Control is powered.

Ruud R802P Furnace Error Code

FLAME LED: OFF.
RESULT: No flame is detected.

FLAME LED: Rapid Blink.
RESULT: Unexpected Flame.

FLAME LED: Slow Blink.
RESULT: Marginal Flame Sense.

FLAME LED: Steady ON.
RESULT: Normal Flame Detected.

STATUS LED: Steady ON.
RESULT: Normal Fault detected.

STATUS LED: 1 Blink.
RESULT: Ignition failure, 1 HR lockout.

STATUS LED: 2 Blinks.
RESULT: Pressure switch stuck open switch will not close when inducer is on.

STATUS LED: 3 Blinks.
RESULT: Limit switch open main limit or roll-out control.

STATUS LED: 4 Blinks.
RESULT: Pressure switch stuck closed. Switch will not open.

STATUS LED: 5 Blinks.
RESULT: Not applicable.

STATUS LED: 6 Blinks.
RESULT: Line and Neutral reversed.

POWER LED: OFF.
RESULT: No power (24VAC) to control board.

POWER LED: ON.
RESULT: Control is powered.

Ruud R96P Furnace Error Code

GREEN LED: ON.
RESULT: Normal operation.

GREEN LED: 1 Flash.
RESULT: Ignition failure (4 trials).

GREEN LED: 2 Flashes.
RESULT: Pressure switch stuck open.

GREEN LED: 3 Flashes.
RESULT: Limit switches open.

GREEN LED: 4 Flashes.
RESULT: Pressure switch stuck closed.

GREEN LED: 5 Flashes.
RESULT: Twin fault.

GREEN LED: 6 Flashes.
RESULT: Brownout voltage.

GREEN LED: 7 Flashes.
RESULT: Hot and neutral reversed or no ground.

GREEN LED: Continuous.
RESULT: Gas valve relay short.

YELLOW LED: Rapid Blink.
RESULT: Flame out of sequence.

YELLOW LED: Slow Blink.
RESULT: Low flame or no flame.

YELLOW LED: ON.
RESULT: Flame present.

ruud furnace error codes

ruud furnace codes


See What Our Customers Are Saying:

by Trevor Owens on Twintech Heating and Cooling

I returned from vacation to find my AC unit on the Fritz. After calling way too many places I connected with TwinTech. I’ve used the company in the past for my furnace so I was happy when I recognized Greg at my front door. He’s great and the service is always top notch. I’d highly recommend using twintech for honest, superior service in the Durham region. Thanks!

by Nicole Alain on Twintech Heating and Cooling

I called Twin Tech when my air conditioning stopped working. Greg came over to diagnose the issue - the same day. He was able to diagnose the issue and resolve it quite quickly. Although it was a quick fix, Greg was very thorough in explaining the issue and provided great advice. Not to mention, I felt very comfortable having Greg in my home - which I consider very important when hiring a service provider. Twin Tech will be my go-to from now on. Thank you!!

by Courtney Parkes on Twintech Heating and Cooling

Just hired TwinTech Heating & Cooling to do an A/C Unit removal & reinstall to allow for landscaping access on the side of my house, and they were wonderful!
Bob, Greg & Mitch make a great team! Quick appointment times, super knowledgeable, expert troubleshooting capabilities & very customer service oriented.
I would highly recommend them for all of your HVAC needs! Great job guys!!

by Jacqueline Graham on Twintech Heating and Cooling

Twintech Heating & Cooling installed my furnace in 2022 and in fall of 2023 installed my Panasonic Heat Pump. Greg and Mitch did a great job. Helped me through the rebate process. Super happy with the Heat Pump. Only used my furnace 5 times this winter. Energy bills lower, carbon emissions lower.Thank you Twintech. I recommend highly!

by Bill Grainger on Twintech Heating and Cooling

Just had a new furnace installed by Twintech. I can’t express how great these guys are at what they do. From the sales to installation they were professional all the way. Very reasonable pricing and courteous during the installation and willing to answer any questions I had. Highly recommended !!!

by Colin Vernon on Twintech Heating and Cooling

They've cleaned my furnace a couple of times and mentioned that the hot water tank standards were going to change soon so I decided to change mine out.

There were a few challenges during the process but the installers handled the problems without missing a stride! I now have really hot water again!

by Heidi B on Twintech Heating and Cooling

Highly recommend Twintech Heating company, we got honest and detailed information on what was needed to replace and install a new gas furnace. Bob and Greg made us feel comfortable withe process through their thorough explanation and knowledge of the right furnace for our needs. The professionalism and courteous friendly attitude towards the customer is what we liked the most as they treated us like family. So happy with our decision and new furnace we will be looking into get our rental water heater replaced and installed by Twintech team. We feel better having their knowledge on our side and will only trust them with any further maintenance of furnace.

by Kirushanth Rasiah on Twintech Heating and Cooling

Customer service and knowledge is priority in this industry, and Twintech has it. I've dealt with their team for maintenance and a furnace replacement. They're accommodating and make great recommendations, and came through at a great price over the big guys in the industry. They'll be my next call when I need service or maintenance.

by Leonard Glass on Twintech Heating and Cooling

I decided that the noises and age of the existing furnace which was old and not very efficient to replace it. Gave Greg a call and Grant and Greg got to work on it. Because of supply issues with the current heating type that would be an easier install Greg convinced me to change the location of the system and it would provide me better service for heat and efficiency. I had skeptical but went ahead anyway putting trust in Greg And Grant. Greg, Grant and Mitch came through and in 2 days had completely relocated my heating and A/C system. I can honestly say Greg was right my old house has been warmer and more evenly heated as it ever was. For anyone reading this rather long winded review can take my word for it, Twin Tech can take care of your needs.

by Nicole Alain on Twintech Heating and Cooling

I called Twin Tech when my air conditioning stopped working. Greg came over to diagnose the issue - the same day. He was able to diagnose the issue and resolve it quite quickly. Although it was a quick fix, Greg was very thorough in explaining the issue and provided great advice. Not to mention, I felt very comfortable having Greg in my home - which I consider very important when hiring a service provider. Twin Tech will be my go-to from now on. Thank you!!

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ruud furnace error codes

See What Our Customers Are Saying:

by Trevor Owens on Twintech Heating and Cooling

I returned from vacation to find my AC unit on the Fritz. After calling way too many places I connected with TwinTech. I’ve used the company in the past for my furnace so I was happy when I recognized Greg at my front door. He’s great and the service is always top notch. I’d highly recommend using twintech for honest, superior service in the Durham region. Thanks!

by Nicole Alain on Twintech Heating and Cooling

I called Twin Tech when my air conditioning stopped working. Greg came over to diagnose the issue - the same day. He was able to diagnose the issue and resolve it quite quickly. Although it was a quick fix, Greg was very thorough in explaining the issue and provided great advice. Not to mention, I felt very comfortable having Greg in my home - which I consider very important when hiring a service provider. Twin Tech will be my go-to from now on. Thank you!!

by Courtney Parkes on Twintech Heating and Cooling

Just hired TwinTech Heating & Cooling to do an A/C Unit removal & reinstall to allow for landscaping access on the side of my house, and they were wonderful!
Bob, Greg & Mitch make a great team! Quick appointment times, super knowledgeable, expert troubleshooting capabilities & very customer service oriented.
I would highly recommend them for all of your HVAC needs! Great job guys!!

by Jacqueline Graham on Twintech Heating and Cooling

Twintech Heating & Cooling installed my furnace in 2022 and in fall of 2023 installed my Panasonic Heat Pump. Greg and Mitch did a great job. Helped me through the rebate process. Super happy with the Heat Pump. Only used my furnace 5 times this winter. Energy bills lower, carbon emissions lower.Thank you Twintech. I recommend highly!

by Bill Grainger on Twintech Heating and Cooling

Just had a new furnace installed by Twintech. I can’t express how great these guys are at what they do. From the sales to installation they were professional all the way. Very reasonable pricing and courteous during the installation and willing to answer any questions I had. Highly recommended !!!

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  • SUBMITTED BY:
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  • - November 5, 2023

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  • - February 14, 2018

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