Solar water heating systems are usually low maintenance, but it is important to follow the instructions of your installer. Solar water heating systems installed will come with a 5 year workmanship warranty and a 10 year or longer panel warranty.
After installation, your installer should leave written details of any maintenance checks you can carry out to ensure everything is in order. This usually includes checking the pressure gauge to ensure there are no leaks.
If the pump runs on a warm, sunny day without hot water or if the solar pipes become cold, check the control panel for warnings and then contact your installer.
To give you peace of mind, some installers will offer an annual service check. This should cost less than a full service, which takes about 10-20 minutes.
You should have a more thorough inspection of your system every five years. This will involve draining and flushing the system as well as replacing the fluid. This is because the protection against freezing provided by glycol decreases over time. Leaving it in place for more than five years may not be conducive to the efficient operation of the system.
If you are going on holiday, you should leave the solar water heating system in operation. Some solar controllers offer a 'holiday' function which will help protect the system if you are away for a few days - but don't forget to turn it off when you return.