What does a hot relay mean?
Car relays get hot. It is normal for the relay coil to be slightly hot during normal operation, but if the contacts are hot, it means that the service life of the relay has expired and should be replaced.
Should a car relay get hot?
Can a relay get too hot?
It is normal for the relay coil to be slightly hot during normal operation, but if the contacts are hot, it means that the service life of the relay has expired and should be replaced. Otherwise, the contact resistance of the contacts will be too large and lead to line failure (excessive voltage drop).
What is the cause of a very hot relay?
If for some reason the armature is stuck or blocked, so that it can’t fully close the magnetic circuit, the hold-in current will be higher than usual, and the coil will get hot. A buzz coming from the relay is a good indication that this is the problem. A possibility is you are supplying an AC voil with DC control voltage.
What are the symptoms of a bad main relay?
While the most common symptom of a bad main relay is that you won’t be able to start your car, that’s not the only thing you need to look out for. Below we’ve highlighted the three most common causes of a bad main relay.
What happens if the fuel relay is bad?
As mentioned above, the main relay controls the fuel system. If the relay is faulty, it will not provide the power with the fuel system needs, and if the car gets no fuel, the car will not start.
What do you mean when you say main relay?
However, when you speak of the vehicle’s main relay, you’re referring to the one that controls the computer and the fuel system. It’s the first thing to engage when you turn the ignition switch.
If for some reason the armature is stuck or blocked, so that it can’t fully close the magnetic circuit, the hold-in current will be higher than usual, and the coil will get hot. A buzz coming from the relay is a good indication that this is the problem. A possibility is you are supplying an AC voil with DC control voltage.
Where do you find the fuel pump relay?
When you shut off the ignition, it powers down the fuel pump. In most vehicles, the fuel pump relay can often be found in the fuse box in the engine bay, which is usually a long black box which contains fuel pump relay along with various other fuses and relays.
While the most common symptom of a bad main relay is that you won’t be able to start your car, that’s not the only thing you need to look out for. Below we’ve highlighted the three most common causes of a bad main relay.
Is there heat coming from the 109 relay?
So even on a correctly working relay, without any heat generated from current flowing through the load side of the relay, there is some heating going on. The 109 relay has been the cause of stranded VWs. I have had the original ones open up, and not provide power leaving me with a stranded car. This was early in the life of the car.