There’s nothing more frustrating than a heater that decides when it wants to work. You wake up on a freezing Melbourne morning, press the button… and nothing happens. Then, by lunchtime, the heater magically starts as if nothing was ever wrong.
If you own a 15–20‑year‑old Bonaire B3 or BV3 with a Comfort Control wall switch, you already know this pain. These units often behave perfectly the moment a technician arrives — only to fail again the next morning.
At REPAIR Heating & Cooling, we hear this story every single week. And unlike the “no‑fault‑found” runaround many homeowners experience, we know exactly why this happens — and how to fix it in one visit.
The 20‑Year Itch: Why Bonaire Heaters in Craigieburn Are Failing
Craigieburn and surrounding northern suburbs were built rapidly in the early 2000s. That means thousands of homes now have Bonaire ducted heating units approaching the 15–20‑year mark — the age where electronic components begin to struggle.
Cold Victorian mornings put additional stress on older parts such as:
- Main PCB (Control Board)
- Pressure Switch
- Fan Motor
- Gas Valve
When temperatures drop below 10°C, these components can behave differently. A heater that works at 2:00 PM may completely fail at 6:00 AM — a classic symptom of temperature‑sensitive electrical resistance.
Real Case Study: The “Cold Start” Fix in Craigieburn
Recently, we visited a customer in Craigieburn with a 2005 Bonaire B3.
Lady was convinced she needed a full replacement — a $3,500+ expense she wasn’t ready for.
Her heater:
- Failed every morning at 6:00 AM
- Worked perfectly at 2:00 PM
- Showed no obvious faults when warm
Diagnosis: The Classic Bonaire Cold‑Morning Failure
After a full inspection, we found the two common issues:
- A tired Main PCB (Control Board)
- A failing Pressure Switch
On older Bonaire units, electrical resistance and continuity changes as the temperature drops. A PCB that works fine during the day may fail to send the correct signal in the cold morning air.
The One‑Visit Solution
Even though many Bonaire boards are discontinued, we carry:
- Motors
- Pressure switches
- Sensors
- Professionally refurbished original PCBs
- And other spare parts
All stocked in our service van and comes with 12 months warranty.
In one visit, we:
- Replaced the PCB and Pressure Switch
- Cleaned internal components to prevent debris‑related shutdowns
- Performed a full Carbon Monoxide safety test
Total time: 90 minutes
Result: A 20‑year‑old heater running like new — no second visit, no waiting for parts, no expensive replacement.
Why Homeowners Choose Us for Bonaire Repairs
When your Bonaire heater cuts out, you don’t need a general heating and cooling guy. You need someone who understands the specifics of the Bonaire brand.
- ✔ One‑Visit Repairs
We carry Bonaire, Brivis, and Braemar parts in our van — meaning most repairs are completed on the spot. - ✔ Transparent Pricing
You pay only the standard call‑out fee plus the cost of parts and installation. No hidden extras. No upselling. - ✔ Safety First
Every repair includes a mandatory carbon monoxide test to ensure your home is safe.
Don’t Replace It — Repair It
You don’t need to spend $3,500+ on a new heater yet. Most Bonaire units still have plenty of life left — if serviced by a technician who knows exactly where to look.
If you’re shivering in a freezing house because your Bonaire ducted heating is failing to start, we are Bonaire service technician, contact us today. We’ll get your home warm again before the sun goes down.