Remote controllers generally have a 5 year warranty, however, there are certain things that are not covered such as water damage, damage due to drops, leaking batteries, or exhausted batteries. We find that replacing the batteries and resetting the remote controller generally resolves the issue. To organise a new remote, please contact us at [email protected] and if you believe your product is within warranty, please supply the model and serial numbers of the indoor unit. To reset the remote controller, locate the ACL button and press it for 5 seconds. Whilst the ACL button is being pressed, the display should go blank. If this does not work, please contact us on the above email address or alternatively, call 1300 364 484.