so the thermostat just went dead?
were you adjusting it when it went blank or?
no.. the a/c was running then stopped.. when it didn't turn back on I went to adjust the temp and the screen was blank
does the thermostat have slide buttons for "cool/off/heat" and "fan auto/fan on" ?
or are they rubber push buttons, actually it would help if you could find the model of the thermostat
have you had any storms, power surges pass through?
Rubber push buttons
is it a model with batteries in it?
checking the breaker
some thermostats run on their own batteries, but some need power from the furnace to display
It is wired into electrical system... just reset breaker with no change
what type of system of this, normal inside furnace, outside a/c unit?
A/c on roof
is this a comercial unit then?
where is the air handler unit? somewhere you can access it?
(the indoor blower)
It is on the roof... ducted into house
ahh ok, sorry im just completely guessing here without a model number for anything
did you find whether the thermostat has batteries or not?
The thermostat is wired into the electrical system.. NO Batteries.. I have all paperwork for thermostat here.. looking for model #
On this system the thermostat is getting its power from the outside unit. you have already checked the breakers for the unit, is there any switches of cutoff switches/boxes that could be shutoff?
if power is getting to the unit, then it could be a low voltage transformer burnt out, or the low voltage automotive type fuse on the control board blown
It has 24VAC
the thermostat does?
reading from the instruction manuel
hmm ok good, i didnt realize you had tested it
for Carrier Heating and Cooling Programmable Thermostat
are you saying is does have power or its supposed to from what the book says?
I didn't test it I am just reading from the manual which states " requires 24VAC to be coonected for proper operation
I don't have ability to test - don't know what 24VAC is
ok, 24vac is the low voltage that the contol side of you system works on
so no batteries right?
Besides checking all switches etc. that you have access to, there isnt alot you can do without getting in there and troubleshooting
not by the sounds of what you mentioned there
Is there a fuse on the unit on the roof that I should check?
is it easy access for you to get to the roof or no? you could look for a blown fuse but even that would involve taking a panel off etc.
in your paperwork is there anything about the model of the outside unit?
I did not find any
I will go up on the roof and look at it
try and find there a smaller (usually brown) wire goes in
1/2 inch or smaller
however it could be in a conduit and you wont be able to see it. We are looking for where the thermostat wires hook up to a control panel
on that panel somwhere (or in its own small holder) should be a auto type fuse
(turn power off of you are going to start poking around taking a panel off..
OH good idea
sorry im talking about 2 different panels, one i mean like a access door, and the other a control board
you will need to take a door off to get to any wiring likely, then have a look around
have a look at any wiring you see, for any burnt wires or melted wires
Going to take fuse to Lowe's to get new one.. kind of brown through glass window...??