Boiler, a much required stuff. But since it is a machine, it needs proper maintenance. Make sure you get the maintenance of the boiler done properly, before it brings a disastrous result to you. But the questions remains that how would you figure out that the time has come to get the boiler repaired. To find it out, here are some of the signs that will help you to understand when you should call up a professional.

If someday you find the boiler making strange sound, then it is the time you should pay attention to the matter. A healthy machine never makes weird sound, though some kind of sound is produced by every machine. But when there is a slight change in the tone, then you must discuss about it with the professionals or call up the individual to get a check-up done to find out if it is all right or not.
When a machine is working, it is quite obvious that it will produce a bit of smell. But like the sound part, if you find it smelling different than the usual, then again it is the time you should go deeper into the matter. This might be a sign of gas being leaked. And, if the gas starts leaking, then it is a dangerous sign. To avoid such circumstances, you must keep on getting the carbon monoxide test done on a regular basis. Since carbon monoxide is a type of gas, so there is no chance that you will be able to touch, feel, or smell it, and this is what makes it all the more dangerous. If the leakage continues, then the outcome may be fatal as well.
If you find water around the unit, which is unusual, then there is the biggest chance of leakage in the machine. When the water is leaking, then it is definite that the machine has to put more stress on the system, and this will ultimately make more damages.
If there is any kind of issue with the boiler, then your electricity bill will also show some signs. The much probability is of receiving high electricity bills. So, if you come across such an electricity bill, then the best way is to get it checked.

If you think you have find any of these issues with the boiler, then you must get in touch with a professional who can fix the issue. It will help you to avoid may other risky issues.