Searched everywhere and can't seem to find any posts so --
My block heater has been working all winter but now it seems like it's not. I checked and I have 120v going to the actual heater in the block. However when I go start her up in the morning the glow plugs are on longer than they used to be and she rumbles like she was ice cold. I checked between the two leads on the actual heater and they have good continuity. Do the actual heaters go bad? If so are they easy to change? It looks like you can just unthread it. How can I test to see if mine is bad?
Thanks in advance for your help