Ameristar mini split error codes
Ameristar is Trane's value brand; its M4TXK and M4MXW mini splits are the same TCL-built equipment as Trane's 4TXK and 4MXW and use the TCL code set.
Covers: M4TXK / M4MXW hi-wall inverter.
Most looked-up Ameristar codes
All Ameristar codes
59 codes. Type to filter the list.
No code matches that. Check the characters (b and 6, 0 and o, and E and F are easy to confuse) or try another brand.
How Ameristar shows error codes
The indoor display shows the code in place of the set temperature. E codes are faults: something has failed and needs diagnosis. P, H, d and F codes are protections: the system stopped or throttled itself to prevent damage, and many clear on their own once conditions return to normal.
Brands built on the same platform
These brands share a code table with Ameristar because the same factory builds them, so their pages describe the same faults: ACiQ, American Standard, TCL, Trane, Zone Air.
Sources
- Trane Mini Split HW Inverter Service Manual (4TXK / 4MXW), SVM027A-EN, 2024, error code table
Updated September 2026. Manufacturer site: www.ameristarhvac.com