I had a post a few weeks ago about it.

YES !!! My truck will not start if it is below 40 deg outside unless it has been plugged in.

 

and the cost of fuel vs how much I drive

Anyway, around here, the cost is 8.5 cents kw/hr, so...

Currently, I am using (.167 kw/hr x 24 hr) * 30 days *.085 / kw = $ 10.22 for power (which when all the taxes & crap is added in gives a bill of about $35)

With the truck plugged in, it is (1 kw/hr x 24 hr) * 30 days *.085 / kw = $ 61.20 for power (add in all the other crap, and it should be around $76)

For the month of dec the garage used 2x the power that my house did !!!!

 

I think there is something else wrong with your truck if it won't start in 30* weather. I live in Wa. and don't plug mine in intill it gets into the teens.

Floyd

 

Read this, it will explain the other problems

https://www.dieseltruckresource.com/...d.php?t=230425

 

At this point I think you better chalk off the block heater too.

No grids, no solenoids, no compression. I think you might want to look into some repair. Electrical bill only will cost as much as the solenoids, next month it will pay for the heater (used), the next month again will pay for the block heater.

I am sorry compression is not fixable with monthly electric savings.

I would not plug it in again unless you call an electrician, you might set your whole house on fire.

 

I had the same problem with my block heater. It started when we moved to Alaska. I plugged the heater in, and it didn't seem to help, I looked at the GFCI and it popped it. In my stupidity I thought it was probably a bad GFCI so I plugged it in to a regular outlet. No problems untill we got our electric bill, holy cow it doubled.
We went through a warm spell and I didn't plug it in for a week, and next time I plugged it in it quit working. I checked the resistance on the plug, and it just wasnt right, it shorted the plug, checked the resistance on the block heater and it was like 20 M Amps. I pulled the heater out of the block and it was very corroded and most of one side of the heating element was gone. I guess thats why the reisistance was so high. 40 bucks later a new block heater and no problems now.
From what I have read the resistance on the stock heaters from Cummins should be around 18 Ohms, if its not around there it should probably be replaced.


Hope this helps.