Personality module and control data are both corrupted.
Likely causes
- Personality module corrupted
- Faulty integrated furnace control
Safe checks for E15
- Write down E15. The troubleshooting step shown for fault 15 is to disconnect power
- Technicianthe chart's possible causes are a corrupted personality module and a faulty IFC. It does not list a filter or a gas-valve check
Capacitors can hold a charge after the power is off. Safety terms.
When to call a pro
Call a licensed HVAC technician. E15 is corrupted unit data on both the personality module and the control.
Find a Trane dealer (official locator, opens in a new tab) ↗Email me this fix
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Request a filter and maintenance reminder
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Parts & tools for this fix
Taken from this code's causes or steps. A search link opens Amazon results and does not confirm a fit. Check the model number in the manual.
Furnace and AC air filter: guide
Technician step in this code: the chart's possible causes are a corrupted personality module and a faulty IFC. It does not list a filter or a gas-valve check
See the guide for what to look for when buying one.
Furnace control board and low-voltage fuse: guide
In this code: Parts list for this code: Integrated furnace control
This one is for a technician to test or replace, so we only explain it and do not link to buy it.