TC reported air-con fault. Unable to reset. Staff(BNV) checked and confirmed no abnormalities. Car w as cooling. TC reported air-con fault. Unable to reset. Staf f(BNV) checked and confirmed no abnormalities. Car was cooli ~~~~~ 3526 TC reported air-con fault Unable to reset. Staff(BNV) confirmed no abnormalities. Car was cooling. 3525 aircon information not available in TIMS. Aircon is cold(23.9*C) Checked 3525 TIMS no aircon information. Swop LHS TRC4 card from 3525 to 2525, fault transferred. Replaced 2525 with TRC6 card. Function test OK. 3525: CU11991 2525: CU12727P2 Opr 20 to replace 2525 TRC6 Celinf/Justin 45429 2525 To replace LHS TRC6.  2525 Faulty TRC6 replaced - Fault cleared. Old: CU12727P2 New: DX31219 Alan/Anand 45429