This article is suited for instant electric hot water systems.
If you water temperature is fluctuating and you have a instant gas hot water system installed, read here
This is one of the more common questions we come across in the plumbing industry.
Particularly with short-stay apartments and rental property’s that have instant hot water systems installed and new tenant occupying the premises.
The answer to the question is more often than not a quick fix. Continuous/instant hot water systems require a minimum flow of water to engage the hot water system and ignite the burners.
Sometimes it can be that the hot tap is not completely turned on meaning the water flow is low. The operator then opens the cold water tap to reach the desired temperature which overpowers and restricts the hot water flow and the hot water system shuts down.
*For the best results, ensure nobody in the house uses the taps or toilet while you’re in the shower.
99% of the time the above steps will solve the problem in fluctuating water. If you’ve followed the steps above and find your water temperature is still fluctuating, it could be due to the following causes;
Hot water systems with water minimum flow rates which can cause water fluctuations;