trane error code 91

If you have a Trane furnace, then you have one of the most reliable heating systems in existence. However, even the most reliable furnace runs into problems from time to time, and this is why your Trane has included several error codes to help you find a given issue. In fact, some codes are there to let you know that your system is functioning properly.

If you notice a light on your Trane furnace that is flashing slowly, this means that your furnace is on but it is not calling for heat. Another common light to be aware of on your Trane furnace is a light that flashes very rapidly. This code is the exact opposite of the slow flashing light code, and means that your Trane furnace is turned on and that it is presently calling for heat.

Without the IFC, your furnace will not be able to work properly, making replacing a malfunctioning IFC and important part of repairing a furnace. If the error code light on your Trane furnace will not come on no matter what your furnace is doing, it means that you need to check your power source.

Hopefully, this will only be a problem with the breaker in your home, but it could be a more serious issue in your furnace that warrants an extensive repair. Watch out for these sequence of flashes:. If you are looking for top-notch air conditioning and heating service, contact Hays today. Ultimate Guide Trane Furnace Error Codes If you have a Trane furnace, then you have one of the most reliable heating systems in existence.

A Rapidly Flashing Light Another common light to be aware of on your Trane furnace is a light that flashes very rapidly.If you want to perform Trane thermostat troubleshooting, use one of the tables from this page: they provide step-by-step fixing instructions for the most popular Trane thermostat models.

Each manual enlists the most widespread technical failures, suggests possible causes and instructs on how to solve the problem. Error alert codes are also explained. Symptom Action Heating or Cooling will not come on.

trane error code 91

Check if the circuit breaker is tripped—reset the circuit breaker. Check if the fuse is blown— replace the fuse. Check for air movement at the register. Check power to the heating or cooling equipment. Temperature setting is too warm or cool. Used for other system alerts: No display No alerts or messages. Used for other system alerts: Filter displayed Filter run timer reached. Used for other system alerts: Maint displayed Maintenance run timer reached.

LED On. Symptom Possible Cause Action Display does not come on. Comfort control is not being powered. Check for 24 Vac between B and Rc.

trane error code 91

Temperature settings do not change. The upper or lower temperature limits were reached. Check temperature setpoints. Check Installer Setup Numbers and ; modify as needed. The keypad is fully locked. Check Installer Setup Number to change keypad locked options. Heating or cooling does not come on. Comfort control minimum off- time is activated.

Trane Air Conditioner Error Code

Wait up to five minutes for the system to respond. System selection is not set to Heat or Cool. Set system Selection to correct position.Is there something wrong with your Trane AC?

Check the appliance for an error code. Having found the code in the list below, you will be able to read the explanation and discover what the problem is. Next, you may try to resolve the issue. In case of a minor issue, you may be able to fix it on your own. If the malfunction is serious, the table will advise you to contact customer care. It can be caused by:. Wait until the power supply is normal and reset the unit. Make sure that voltage in the outdoor unit is normal. It should be equal to the power supply voltage.

If it is not, check the voltage between L and N is equal to the power supply voltage. If it is not, make sure that the wiring of L and N is correct. Check the voltage at the bridge rectifier. If it is not equal to the power supply voltage, check whether the wiring at the rectifier is correct. If it is, check the voltage between P and N.

To see if it is normal, refer to a table in your instruction manual. If the value is normal, the IPM board or outdoor PCB board or both, if they are combined is faulty and needs to be replaced. If the value is incorrect, check the bridge rectifier. Check the positive and negative continuity values of one diode.

Refer to the table. If they are zero or infinite, the rectifier is faulty and needs to be replaced. However, if it proves to be ok, replace the PFC module.Remember Me?

Results 1 to 2 of 2. Thread: trane communication error Thread Tools Show Printable Version. Join Date Sep Location miami,fl. I reset the breaker and still the same thing.

I have 24v to my indoor control board and I have 24v to my outdoor control board. I ohmed my 2 wires going out to the condenser and they are good. I also ohmed the float switch and they have an on call box from the local utility company both are closed I jump it out for the hell of it but still error I feel its one of the control board but not sure wich one, or possibly both.

If it has 2 wire going to outdoor it and its not all communicating that would be the problem you need a wiring harness and relay panel so they can all talk the board will flash how many devices are communicating I we put a bunch of these in and I have the tech manuals is this new install because you can fire it from the in test mode to balance the refrigerant but when you get out of technician access and try to run normally you will get that code found that out the hard way also if you do run it in 24volt mode you can't use the out door sensor in the unit.

Please read this Valves, Regulators, Filters, Etc. All times are GMT The time now is PM. All rights reserved.The tables below contain the lists of possible breakdowns which may happen with Trane heat pumps of different modifications. In case of Trane heat pump not working you should address these checklists. There are types of faults and problems with detailed descriptions, possible causes and solutions which may be recommended in the certain situations.

If you feel the temperature in your house is getting higher, it may be because of heat pump fan not spinning, and therefore, heat pump not cooling. The information given below can be helpful for you then. Monitor light. Fault C High DT i. On initial trial for ignition.

trane error code 91

Automatic reset is immediate once the gas valve relay check results are acceptable. If valve is open when it should be closed the heater will shut down and go into lockout.

Trane Air Conditioner Error Code

Blower will operate until error condition is corrected. Automatic restart 2 minutes after error is corrected. If valve is closed but flame is sensed the blower will run for 5 s then start a new ignition sequence. If error occurs 10 times during a call for heat the control will go into lockout. Automatic reset is 60 minutes. If control input data is corrupted the heater will shut down and go into lockout. If flame is sensed with the gas valve off the control will go into lockout.

The blower will run until error condition is corrected. When corrected, control will run blower for 5 s then automatically restart after 2 minutes. This code will display if V polarity is reversed, low voltage is detected, or if the ground path is not sufficient. Reset is immediate after error is corrected.

If the blower prover switch does not close after the blower starts the control will stop the ignition trial go into lockout. The blower will continue to run.

Thermostat Controls Troubleshooting

Automatic reset is immediate after the switch closes. If the blower prover switch opens unexpectedly during operation the control will shut down and attempt to re-light. If the switch does not close after the blower starts the control will go into lockout with the blower running.The following information is for educational purposes only. Tampering with your system may void your warranty. Your thermostat may not be set properly. Check to see if your thermostat is properly programmed to heat or cool your home depending on the season.

Make adjustments where necessary. You can also try resetting the thermostat by turning it on and off. Sometimes thermostats are programmed to different temperatures during different times of the day. Program your thermostat within a comfortable range for each individual day of the week. It might be a problem with your wireless router and modem.

Ultimate Guide Trane Furnace Error Codes

Contact your Internet service provider if the problem persists as it could be an issue with your Internet connection. It may also be an issue with your Internet service provider. Contact your Internet service provider to make sure your wireless internet is working properly.

You can close and confirm your location on the form or view all dealers in your area. Find a Local Dealer. Call to speak with a dealer. Contact a local dealer Troubleshooting User Manuals. Check out these common troubles and possible solutions. Thermostat Controls Troubleshooting. Select Maintenance Topic. I understand these calls may be generated using automated technology and my consent does not imply or require that a purchase be made. Still have questions?

Change Service Location. Update Zip Code. Please enter a valid zip code. See all dealers. See More. Tell us what you think Please take a short survey about your experience on Trane.

Start Survey. Not In Service Area. Find dealers in your area.The following information is for educational purposes only.

Tampering with your system may void your warranty. You can close and confirm your location on the form or view all dealers in your area. Find a Local Dealer. Call to speak with a dealer. Contact a local dealer Troubleshooting User Manuals. Our guides can help answer your questions. Check out these common troubles and possible solutions.

Our licensed experts have the knowledge and expertise to address all of your home HVAC needs. Troubleshooting Guides. Select Maintenance Topic. Before you call for service, check the following:. Need Emergency Service? Find a Dealer. Browse maintenance tips for:. Back to Owner Support. I understand these calls may be generated using automated technology and my consent does not imply or require that a purchase be made. Still have questions? Change Service Location.

Update Zip Code. Please enter a valid zip code. See all dealers. See More. Tell us what you think Please take a short survey about your experience on Trane.

Start Survey. Not In Service Area. Find dealers in your area.