It is recommended to check the outlet of the hot water faucet. If it is small, it may be caused by insufficient water flow. Because the gas water heater is water-controlled, there is a minimum water flow requirement, which cannot be met, and the water heater cannot be deflated and the igniter cannot be turned on, so it cannot be used.

Cold water is normal, but hot water is small. We should consider why there is a large amount of hot water, but now the amount of hot water is small. The reason is that the scale accumulates more and more, blocking the pipeline, the water flow rate does not meet the conditions, and the water heater can't catch fire.

There are many reasons why gas water heaters are not easy to ignite. Damage to water, gas and electrical components will cause the water heater to fail to ignite. But now the quality of water heater components has generally improved, so it is not so easy to break down. In fact, the reason for their ignition failure is that the hot water pipeline is blocked by scale, which leads to a large back pressure of water flow. To a certain extent, the water-gas linkage device of the water heater can't open the airway, and of course it can't ignite without gas. If the hot water tap is fully open, the hot water pressure is small.

It is recommended to clean and remove scale immediately. You can buy a set of disassembly-free descaler for gas water heater online, and use it to inject descaling agent into the water heater and clean the inside of the water heater and the hot water pipe. The operation is simple and convenient, and it can be cleaned regularly in the future, which can avoid the recurrence of this problem.