Dear Khun Vincent and Khun Keng,
Mahajak they will come on 8-9/06/15 at 10:30am. to continue job of cleaning the cold coil we must to stop the A/C all day.
(This is not the annual cleaning as per contract).
By the Way they come back to big cleaning A/C as per contract on 1-2/07/15 at 10:30 am.