I am having a Honeywell T8411R thermostate installed but it never lights up or turns on. Do I have to wait the 5 minutes before it will acknowledge being connected?

no, should light up as soon as you turn it on. does it have battries? did you turn the power of to the furnace befor instulation?

What do I do I have had the elements replaced and the big circut board replaced and the tech has gone thru 2 packs of 3amp fuses everytime he puts one in it blows and the thermostat never registers any power what cound the short be.

do you have a gas furnce or a heat pump??

Oh sorry its a heatpump its a 2001 goodman

and it worked fine before you tried to install a new stat?

red- r
yellow-y
orange-o
black-x or l
blue- c
white-aux or w1
brown- w2 or e
green-g

i wish.... I just moved in here in August Im in South Carolina and we had a cold snap and when I turnrd it on at the stat it sparked and smelled like wires burning......(not good) so I called some one and they came out and opened it up and found that when they enclosed it they ran a screw into the low voltage line whitch inturn fried the elements and some other stuff we have had replaced it fried the stat to. I will pull off cover and tell you what colors are going to what....thanks so much for your time

g is green
c is blue
r is red
y is yellow
L is empty
w2 is white
E is empty
B is empty
o is orange

do you know where they are hooked at on the furnace control board?
and does this stat take battries??

I have no idea where they connect at and nope no batteries( i am emailing a pick of what was melted maybe that will help)

wow that is a melt down. what all the melted parts and wires replace with the exact parts?

Yes they hooked it up so I have heat from the heatpump if it gets that cold, I just have to turn it on a breaker box

even went under house to check stat line and said it looked fine but could it be damaged inside after a melt down like it had? Should I ask them to just run a new Stat line?

you mean the heat pump comes on as soon as you turn the breaker on, with no t-stat??

ya and then i have to turn it off at breaker also. I think he straight wired it for emergancey heat

it has 24 going in and 24 coming out but nothing going to stat

sounds like maybe the common wire is in the wrong sopt or maybe the contactor got burt also during the melt down. if it is jumped to run at the unin that is way the t-sta will not light up. the wire form out door to inside should be ok, it may need to be redone outside if it was melted.

so maybe i need to replace the small board also?

So whitch one of those would cause the 3amp fuse to blow everytime?

some where it is sending power to a common to blow the fuse so the probem is somewhere in the blue wire going to a power. either it is in the wrong spot or touching the red.

could it be wrong at stat?

if it has a w2 and an, o and an, e it is a heatpump stat, so it should work.

have you had the same company out everytime sence the melt down? and if so how many times have they been there?

ok well the tech is coming back out 2maro afternoon I will go over this stuff with him and hopefully be able to send ya an email saying it works..... :) thanks for your time and knowledge

Yes and it has been twice the first time they got me some emerg. heat cause it was 38 degrees that night and then they got all the parts in and came out today and got power going in and out but no stat

ok well let me know what happens. hope it works out.

ya me to before it gets cold again its going to be low 40's and high 30's at night this week.....I am not use to the cold here yet