Pilot-model ignition failure
Older pilot-ignition Highflow units in Geelong homes lose the pilot in cold, gusty weather. Newer electronic-ignition models removed the problem entirely.
Compact gas continuous flow units and electric storage. We repair, replace and install the Bosch range across Geelong.

Bosch has supplied instantaneous gas water heaters worldwide for decades, with a strong presence in Australian continuous flow installations.
Continuous flow heat exchangers typically carry longer cover than other components; licensed installation and correct gas sizing are required.
Igniters, water valves, sensors and flue components for common Bosch units.
Bosch continuous flow units regularly run 15–20 years when serviced; the electric storage range follows the usual 8–12 year pattern.
Weighing up whether to fix or replace a Bosch unit? Read our repair or replace guide and the Geelong replacement cost guide. If you have no hot water right now, start with the no hot water troubleshooting guide or call for emergency hot water help.
Answer a couple of quick questions so we can get your hot water sorted.
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Older pilot-ignition Highflow units in Geelong homes lose the pilot in cold, gusty weather. Newer electronic-ignition models removed the problem entirely.
Shows as reduced output and fluctuating temperature. Geelong's Barwon Water supply is relatively soft, so this is less aggressive here than in harder-water regions — but not unheard of on 20-year-old units.
Unit runs hot then cold, or won't modulate. Usually a stocked sensor or valve rather than a heat exchanger issue.
We regularly find older Bosch units with flue terminations too close to a window or under an added deck — corrected at service or replacement.
A cracked or leaking Bosch heat exchanger out of warranty is the replacement trigger. Ignition, sensor and valve faults are worth repairing on almost any age unit.
Our repair or replace guide sets out the full decision, and the Geelong replacement cost guide explains what changes the price. Symptoms are covered in common hot water problems and the hot water FAQ.
Tell us the model and the symptom — or the error code if the unit shows one — and we'll diagnose the fault properly, then explain whether repair or replacement makes more sense for your Bosch system before any work begins.
Servicing central Geelong, Newtown, Belmont, Highton, Grovedale, Corio, Lara, Leopold and the Bellarine.
Send through a quick enquiry and we'll get back to you fast to help sort your hot water.