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Can you have hot water at the same time? Are you boiling the water too small, if the water is too small, the gas water heater can't ignite, I've experienced this, you go back and try, maybe it's okay to turn on the water a little bigger, don't save too much water!
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Drive for a while, or maybe you're driving too small!!
If you need to turn on the hot water faucets in both the kitchen and bathroom to turn on the fire, check if there is a problem with the water heater water flow switch.
First, if the water pressure is not enough, a booster pump can be installed on the water pipeline. >>>More
Pay attention to how many amperes the air switch is, and then see how many watts the electric water heater and hair dryer are, and whether the sum of the two is equal to or greater than the amperage of the air switch, which means that it is normal. Just don't use them together again.
As long as the installation is properly, the gas is sufficient, and the water pressure is enough, you can completely install two or three water heaters, mainly depending on your hardware conditions.
There will be no uneven heat and cold, air energy water heaters generally do not appear in this situation, I use a Finney air energy water heater at home, providing the whole family with constant temperature central hot water, there has never been such a problem.