The new season is not expected until Q4 2021, 10ās head of programming Daniel Monaghan told TV Tonight.
The show debuted in October 2018 with the next two seasons premiering in February in 2019 and 2020.
Hereās hoping 10 donāt over saturate re-runs of this show on the main channel this year before the premiere of Q4 later this year, further diluting the audience.
Unfortunately I expect them to do just that, especially on the wasteland that is Saturday nights and maybe the occasional Thursday or Tuesday when they are thin on content.
They could really create a new multi-channel called 10 Ambulance since they really love airing re-runs of the show over and over again 
Season 3 of Ambulance Australia premieres on TVNZ2 in New Zealand this Thursday (September 2) at 9.05pm.
Promo for season 4 aired tonight during Iām a Celebrity Get Me Out of Here. It was again filmed around South East Queensland.
It starts Wednesday, February 9 at 7.30pm.
Promo here
Edit: Qldās version differs slightly in that it says Queenslandās Own are there to save the day at the beginning of the promo.
Not All Heroes Wear Capes. They Wear Teal.
Ambulance Australia Premieres Wednesday, 9 February On 10 And 10 Play On Demand.
They are the faces you hope to never see, but when you do need them in possibly the worst moment of your life, they are only one call away.
With honesty and transparency, the gripping fourth season of Ambulance Australia will premiere at 7.30pm on Wednesday, 9 February on 10 and 10 Play on Demand.
Narrated by Lisa Wilkinson, the fly-on-the-wall series goes beyond the lights and sirens to the heart and soul of the men and women devoted to helping others in what is often the most vulnerable and confronting point in their life.
The new series will take an extraordinary look at the gritty yet heartwarming tales from the Queensland Ambulance Service frontline.
Viewers will follow each step of an emergency response, from the Emergency Medical Dispatchers who answer the Triple Zero (000) calls and manage the high-pressure logistics of prioritising the most urgent cases, to the Paramedics who rush to an incident where they are forced to make split second decisions that can mean the difference between life and death.
If you can get through this promo without tearing up, you may need to get your heart checked. We know some great paramedics.
Watching this now and it really makes you realise just how bad Ambulance ramping is in Queensland. 
Come Behind The Lights And Sirens.
This Week On Ambulance Australia.
In this weekās extraordinary episode of Ambulance Australia , take a look at the everyday demands on call takers, dispatchers and on road paramedics, who are forced to make split second decisions that can mean the difference between life and death.
For paramedics like Advanced Care Paramedic (ACP), CJ, every day is another opportunity to make an impact in what could be the worst day of someoneās life.
With Ambulance Australia returning in 2023, is there any word that Lisa Wilkinson returning as the narrator? There hasnāt been much talk since deciding to leave The Project apart from ābeing in talks about future projects on 10ā.
I canāt see why that would change. It would take Lisa maybe 2 afternoons to read the script for an entire season. 
First promo for the new season aired tonight during Gladiators.
The new season starts Wednesday, February 7 at 7.30pm.
Promo here
https://x.com/channel10au/status/1750073520984371607?s=46&t=RPKXX3QJ5bwM_6c5rMb0SA
10 shouldāve had this promo airing for the last couple of weeks in rotation with DOND, Dog House, Survivor etc etc. Absolutely useless
Not All Heroes Wear Capes. They Wear Dark Blue.
The Groundbreaking New Season Of Ambulance Australia Premieres Wednesday, 7 February At 7.30pm On 10 And 10 Play.
They are the faces you hope to never see, but their appearance in a time of great distress, can save your life.
Season five of Network 10ās powerful Australian documentary series Ambulance Australia, will premiere on Wednesday, 7 February at 7.30pm on 10 and 10 Play.
Narrated by 10 News First National Weekend News Presenter, Chris Bath, Ambulance Australia is the groundbreaking series which looks beyond the lights and sirens to the heart and soul of the men and women devoted to helping others on the toughest day of their lives.
With unprecedented access to the NSW Ambulance, Ambulance Australia goes behind the scenes of Australiaās busiest Ambulance service, responding to a call every 26 seconds.
Every day, emergency medical call takers, dispatchers, specialist clinicians and paramedics make split second decisions that can mean the difference between life and death. Over the past year, in NSW alone, 1.2 million calls were made to NSW Ambulance Triple Zero. Delving into the day-to-day operations of the 20 paramedics and three duty operations managers, this season is full of stories from the front line, where nothing is taken for granted.
In cooperation with NSW Ambulance, Ambulance Australia is produced by Endemol Shine Australia, a Banijay Company, for Network 10.
New narrator, replacing Lisa.