If you have a booster-assisted heating system, it can be difficult to tell whether or not your solar input is responsible for the poor performance. Oftentimes, this is found out way too late after the previous month’s utility bill indicates significant gas or electric usage. To quickly verify whether or not your solar hot water is working, you must check your system's switchboard. If the boost switch has been left in the “on” position, simply flip it back to “off” to resume solar power. If you do not have hot water after this, then there is an issue with your collector or heating system.