Envirosun Solar Hot Water Repair
Fast, expert repairs and servicing for Envirosun solar hot water systems — genuine parts, same-day service and free replacement quotes across the Sunshine Coast, Brisbane, Bribie Island and Gympie.
- 25+ years experience
- Licensed & insured plumbers
- Genuine Envirosun parts
- Same-day service available
Common Envirosun Faults We Fix
Envirosun playing up? We'll get it sorted.
From boosters and relief valves to full system replacements — here are the faults we're called to most, and exactly how we diagnose them.
Envirosun Repairs
Envirosun No Hot Water
If your Envirosun hot water is not working at all, the fault is almost always electrical rather than solar. A failed booster element, a tripped circuit or a dead thermostat leaves you with a full tank of cold water even when the collectors are working perfectly.
We test the element, thermostat, circuit and controller before replacing anything, so you are not paying for parts that were never the problem.
What we check first
- Booster element and thermostat
- Circuit breaker and power supply
- Controller display and error codes
- Roof and tank sensors
- Tempering valve
Envirosun booster not working
- Element failed or heavily scaled
- Thermostat out of calibration
- Booster switch or timer fault
- AES control not switching the booster in
Envirosun Repairs
Envirosun Booster Not Working
On a solar system the electric booster covers you through cloudy weather and heavy use. When the Envirosun electric booster is not heating you will notice it first thing in the morning, or after back-to-back showers.
Envirosun list a booster or AES that is not operating as a distinct fault, and it is one of the most common Envirosun solar hot water booster problems we are called to.
Envirosun Repairs
Envirosun Hot Water Leaking
Some discharge from the expansion control valve and the pressure and temperature relief valve is normal. Envirosun’s own documentation notes that excessive discharge indicates a problem.
If your Envirosun relief valve is leaking constantly, or water is pooling under the tank, it needs looking at. A leaking valve is a cheap repair. A leaking cylinder is not repairable.
Common leak points
- Pressure and temperature relief valve
- Expansion control valve
- Roof collector seals and pipework
- Tank fittings and connections
- The cylinder itself, which means replacement
Envirosun Repairs
Envirosun Solar Hot Water Not Getting Hot Enough
If your Envirosun water is not hot enough, runs out quickly, or the hot water goes cold partway through a shower, the cause is usually low solar input rather than a failed tank. Envirosun list shaded or dirty collectors, poor solar gain and booster faults among the causes of insufficient hot water. A system running entirely on its booster still delivers hot water, so most people never notice the solar side has stopped contributing until the power bill arrives.
Envirosun Repairs
Envirosun System Replacement
Most Envirosun faults are worth repairing. A sound tank will usually give years more service after a pump, controller or element replacement. Replacement is the right call when the cylinder is leaking, the system is past roughly 15 years and failing repeatedly, or parts are no longer made for a discontinued model.
Your options
- A new solar hot water system
- A heat pump, if shading has changed
- Payment plans available
FAQs
Envirosun Hot Water Repair — Common Questions
Why is my Envirosun hot water not working at all?
Almost always the electric booster rather than the solar side. A failed element, tripped circuit or dead thermostat will leave a full tank of cold water even when the roof collectors are working normally. We test the element, thermostat, circuit and controller before replacing anything.
My Envirosun booster is not heating. What causes that?
The most common causes are a failed or heavily scaled element, a thermostat out of calibration, a faulty booster switch or timer, or the AES control not switching the booster in. Envirosun list a booster that is not operating as a distinct fault in their own troubleshooting material.
Is it normal for my Envirosun to leak from the relief valve?
A small amount of discharge from the expansion control valve and the pressure and temperature relief valve is normal, particularly during heating. Envirosun note that excessive discharge indicates a problem. Constant dripping, or water pooling under the tank, should be looked at.
Why is my Envirosun solar hot water not getting hot enough?
Usually low solar input rather than a failed tank. Shaded or dirty collectors, poor solar gain, a stopped circulating pump or a booster fault will all reduce output. A system running entirely on its booster still gives hot water, so the solar loss often goes unnoticed until the power bill.
Do you repair Envirosun systems in Brisbane as well as the Sunshine Coast?
Yes. We repair and service Envirosun solar hot water systems across the Sunshine Coast, Brisbane, Bribie Island and Gympie, with same-day service available in most suburbs.
Can you still get parts for an older Envirosun system?
In most cases, yes. We hold genuine Envirosun elements, thermostats, anodes, pumps, controllers, sensors and relief valves. Read the model and serial number off the compliance plate on the side of the tank when you call and we will tell you straight away whether the part is still available.
Book an Envirosun Repair
Same-day service available in most suburbs across the Sunshine Coast, Brisbane, Bribie Island and Gympie. Free quotes on replacements, and payment plans available.
Loved by Local Homeowners
Rated 4.9 out of 5 across hundreds of reviews.
“Booked in the morning, hot water back on by the afternoon. Friendly, tidy and great value.”
“Honest advice and no pushy upsell. Replaced our old system with a heat pump and the bills have dropped.”
“Fantastic service from quote to install. Highly recommend SunCity for anyone needing hot water.”
Need hot water fast?
Get a free quote today — same-day service available across SE QLD.