I'm in the blizzard. Outdoor unit it iced up and defrost isn't staying on long enough to remove all the ice. I know this isn't a DIY forum, but I need help.
I've changed the defrost time lapse setting before. I turn off the heat at the thermostat, and pull the breaker at the outdoor unit before I take the control box cover off. I change the jumper and put everything back to normal. Easy.
Now I want to force a defrost. I know this needs to be done with the unit running in heat mode. But:
1) Is it the Jumper labeled "DFT" on this board http://www.arnoldservice.com/Hk32ea0...st%20board.JPG, and do I jump P3 to 1?
2) Can I just use a screwdriver to jump the pins?
3) Do I do this while the outdoor unit is actively heating with the fan running (ie, crank the indoor heat up so that the outdoor unit stays running)?
4) Do I need make sure I do it for less than 10 minutes?
No one is available to come out and do anything in the middle of the blizzard so it's just me and my screwdriver. PM me if you want my email address.