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My Trane XE 90 has 4 blinking red lights

Post created: 2015-10-19 Type of Equipment: Furnace Views: 807

This question was created on the page: https://www.furnacecompare.com/furnaces/trane/xe90.html.

On 2015-10-19 Eric wrote:

When your Trane Furnace is blinking a red light, it usually indicates there is trouble with the furnace unit. There are different blinking patterns associated with the problem. There is a code identification list located on the inside of the panel door itself. Remove the door then identify the blinking pattern compared to the list on the door. That will give you a short description of the problem the furnace is experiencing. Keep in mind the list does not provide solutions to solve the problem. Your furnace manual will have some explanation and solutions for the problem. Here is a link to Trane indoor unit owner's guide https://www.trane.com/content/dam/Trane/residential/downloads/manuals/32-5064-WEB01_Indoor_Units.pdf

If you do not feel comfortable tackling the job yourself, then we recommend that you hire a licensed heating contractor to help you sort out what's going on. You can go back to the company that installed the unit, ask your neighbors for recommendations, or we can help you find a contractor here: https://www.furnacecompare.com/perl/find_contractors.pl.

keep in mind I am not an HVAC contractor. Licensed HVAC contractors spend years in school and in on-the-job training before they repair heating and cooling equipment on their own. So, if you aren’t 100% confident in your abilities, please hire a contractor.

On 2015-10-22 Mark wrote:

This means thermal limiting switch open. There are two thermal limiting switches. One in the vicinity of the heat exchanger and one on the induction fan.

The question is why the switch opened.....

On 2015-10-22 wrote:

I just had the same problem and replaced the thermal limiting switch that was corroded..... You can put an ohmmeter on each switch and it it's good it should have zero resist across it. If not its bad.... Again bigger ? Is why the switch opened.......

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