What is the reason for no response from the starter motor when the engine is hot?
2 Answers
The reason for no response from the starter motor when the engine is hot is that the pull-in coil and hold-in coil of the electromagnetic switch short-circuit or ground due to decreased insulation performance after temperature rises. Below are some maintenance tips for the starter motor: Develop a good starting habit. Generally, do not start the engine for more than 5 seconds at a time. Allow an interval of at least 15 seconds between consecutive starts. If the engine fails to start normally after three consecutive attempts, wait for one minute before trying again. Avoid prolonged continuous starting to prevent burning out the starter motor. Regularly inspect the battery to ensure it has normal capacity and sufficient power to start the engine. After a certain period, be sure to have it checked at a professional repair shop. Clean the engine compartment regularly to prevent dust, oil, and water from corroding and aging the wiring harness. This can cause poor contact or rust at the starter motor connections, affecting normal engine starting. Normally, maintenance is not required. However, if you notice symptoms like grinding gears or weak starting, have the starter motor serviced at a repair shop.
As a car enthusiast, I often pay attention to such issues. The starter motor not responding during a hot start is a fairly common problem. Possible causes include an aging battery that can't provide sufficient output voltage under high temperatures; severe wear of the internal carbon brushes in the starter motor, leading to poor contact due to thermal expansion; or faults in the ignition switch or relay, which are more prone to failure when hot. For example, after a long drive, if the car doesn't start when you stop and try again, you should first check if the headlights turn on. If they're bright, the issue might be with the motor. It's advisable not to force multiple attempts to avoid damaging the circuit. Instead, find a safe parking spot and contact a professional technician for diagnosis—spending a little now can prevent bigger troubles later. Safety first; regular maintenance and checking of wear-prone parts can reduce such occurrences, especially during hot seasons. I've read that overheating can cause component deformation, exacerbating the problem, so timely action is crucial.
