Every once in a while, there may be an issue with a residential steam shower, in which the water coming out of the shower is too hot or too cold. You may have experienced this issue before even in a regular, non-computerized shower.
There are some things you can do to troubleshoot this temperature issue. After all, no one wants to take a super cold or a super hot shower, and everyone has their own personal preferences for shower temperature. Additionally, you may prefer to use your shower at a hotter temperature during the winter months and at a cooler temperature during the summer months.
The thermostatic valve in the shower mixes the hot and cold water. You choose how hot or cold you want the water by turning the valve towards the hot or the cold side.
This is a photo of a thermostatic mixing value, which has been taken apart.
Problem: The water in my shower is too cold.
If the water in your shower is too cold, the check valve located just before the thermostatic mixer may be damaged or blocked. Sometimes, the center rings inside the check valve may melt and may block the valve. Your shower is too cold because no hot water is able to enter the shower through the check valve.
If there is no problem with the check valve, check the condition of the water line connections and hoses. The hose is braided steel and goes from the wall of the bathroom to the shower. Sometimes, these hoses become kinked and block the water from entering the shower. If there’s a kink in a connection or something inside the hose is blocking the connection, the shower will not receive hot water. You may be able to solve this problem by straightening out the hose.
If none of the problems above exist, then you may be experiencing a problem with your hot water heater. Check that your water heater is functioning correctly; it may have to be maintained.
Problem: The water in my shower gets really hot and cold, but I can’t use warm water.
Sometimes, the thermostatic mixing valve in the shower is clogged and needs to be cleaned. When this happens, the shower will release very cold water and very hot water, but you will not be able to find a warm, in-between temperature.
To fix this, take apart the valve and clean it. You should clean and lubricate the inside of the thermostatic mixing valve once a year to prevent clogging. You can clean the inside with a toothbrush. Also, use a silicone based water proof grease on the moving parts of the valve.
If cleaning the thermostatic mixing valve does not fix the problem, then the mixing valve may be failing. You will need a replacement thermostatic mixing valve.
If you’ve followed these instructions, and your steam shower is still not functioning properly, call our technical support staff at 714-622-1550. We will be happy to walk you through these steps and help you fix the problem.