Generac Generator Failure Reasons

When you get a generac key, undoubtedly you can turn on and turn off the generac generator. However, sometimes your generac generator fails to start even with your keys. You may ask “why does it happens”? Don’t worry, this article will tell you the reasons.

Why Your generac generator fails to start?

Bad fuel mix

Usually one of the reason why your generac generator won't start is related to fuel somehow. Poor fuel mixing can happen in many ways. For example, when you run out of fuel, the engine gets air but no fuel. Moreover, a blocked intake means there is fuel but no air. Meanwhile, the fuel system may supply too much or little fuel to the mixer, as a result, combustion within the engine cannot proceed properly. Besides, there may be impurities in the fuel (i.e. water in the fuel tank) that prevent the fuel from burning, usually occurring when fuel has been sitting in the tank for an extended period of time.

Low coolant level

An internal blocked radiator core may make the coolant level low and shut down. When the generator is running under load, the thermostat turns on fully when the engine reaches its optimum operating temperature, which means the radiator cannot get the right amount of flow through the core. Because coolant has to flow somewhere, it escapes through the overflow tube. When the engine cools and the thermostat turns off, the liquid level drops and the low coolant level that activates the generator closes. Because this can only happen when the generator is at its optimum operating temperature under load, you’d better test your generator with an external load group with sufficient load to reach the temperature value needed to turn on the coolant thermostat.

Without the radiator coolant, the engine can quickly overheat, leading to mechanical failure and engine failure. Coolant levels should be checked regularly by visually checking for any coolant puddles. Coolant colors varies, but the most common color is red.

Controls not in auto

When the control panel reads "not in auto," it is the result of human error, usually due to the master control switch being in the off/reset position. When it is in this position, the generator may not start in the event of a blackout. Therefore, you need to periodically check the control panel of the generator to ensure that the "not in auto" message is not displayed.

Battery failure

One of the most common reasons for a generac generator failure is a faulty battery. Typically, this can be caused by a loose connection or a buildup of sulphate. When the battery acid in the electrolyte is severely discharged, a buildup can form on the plates, preventing the battery from delivering enough current. Battery failure can also occur due to the charger breaker being open and inoperable, usually owing to a fault in the battery charger unit itself or AC power being disconnected by a tripped breaker. This usually happens when the charger has been turned off and not turned on again after repairs or maintenance are complete. After repairs or maintenance, always double check the generator system to make sure the charger power circuit breaker is in the correct position. Lastly, dirty or loose connections can also lead to battery failure. Joints need to be cleaned and tightened regularly to prevent potential failure.