For the record I have not had a fuel heater working in single digits with no problems as well as many other users. I would leave it unplugged and not look back unless you are in artice temps.

 

The general feeling from most of us is as Tim stated,, You will sooner have trouble with the fuel lines ,,before the bowl will be a problem...

Keep the water out of the bowl ,,,& you most likely won't have problems...

Part #'s here is you feel it is nessesary

Ford #: F5TZ-9J294-A
IH #: 1825186C91

 

Or you can upgrade it, like this:

http://www.thedwilsons.com/powerstro...eater_Mod.html

 

If you get into changing it remember the black plastic standpipe holding it down has LEFT HAND threads. You will need a crowfoot wrench to get it out. Or do like i did and take a torch heat up a wrench and bend it. Sorry but I forgot whatsize the wrench was but I do remember paying over 60 bucks for the heater at the stealership

 

it is a 7/8" crowfoot wrench

 

It is very easy to change.