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Brian HVAC Guy
Brian HVAC Guy, HVAC Technician
Category: HVAC
Satisfied Customers: 919
Experience:  I have been an HVAC/R mechanic/technician for 30+ years.
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I'm not at home right now I do have a train furnace, and the

Customer Question

I'm not at home right now I do have a train furnace, and the thermostat that was installed with it is reading error 26, and the heat is not coming on even though the furnace seems warm as if it is trying to work. Can you tell me what error 26 means
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Submitted: 1 year ago.
Category: HVAC
Expert:  Brian HVAC Guy replied 1 year ago.
Hi I'm Brian and I'm here to help! Error code 26 on a Trane system with a Trane thermostat indicates a high temperature limit fault. This means the furnace fired (hence being warm) and the operating temperature got too high and tripped out. This can be cause by many things: A dirty air filter is the most common cause; A failed blower or blower motor; A very dirty A-coil for cooling will cause this (if equipped with cooling); A relay or control board issue; A failed blower motor capacitor; A failing variable speed motor drive (control on end of a variable speed motor). These are the most common cause of a high temperature limit trip and fault. Let me know if you have further questions on this subject. Otherwise, please remember to rate before leaving (3 stars or higher please!). Bonuses are always appreciated! Thanks for allowing me to help and thanks for using Just Answer!Thank you,Brian

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