Before you call, check this.
Pick the system and what it is doing. You get the likely causes, the things worth checking yourself, and a straight answer on whether it needs a visit today.
The system
What it is doing
When to book what
The east runs on two seasons. Book the service in the quiet window and skip the queue when it turns. The marked column is this month.
Month
MarAprMayJunJulAugSepOctNovDecJanFeb
Heating
Mar to AprPre-winter service windowMay to JulBreakdowns peakAug to SepRebate changeovers
Cooling
Oct to NovPre-summer service windowDec to FebBreakdowns peak
Guides, the way we explain it on the doorstep
Ducted heater not firing: what to check before you callThe five things to check when a gas ducted heater will not start, which ones you can fix yourself, and when to call for a same-day repair.Read the guide 
Evaporative cooler smells or dribbles: the pre-summer checklistWhy evaporative coolers fail on the first hot day, what a pre-summer service covers, and the three things you can do yourself in October.Read the guide 
Gas or electric in 2027: what Victoria's changes mean for your heaterWhat changes on 1 January and 1 March 2027 for Victorian homes and rentals, who it affects, and what the $5,530 rebate means if your gas ducted heater is due for replacement.Read the guide Heater or cooler playing up?
One call, a straight answer. Or text a photo of the unit.