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You need to get a different thermostat.you can change an analog thermostat to digital, but you have to replace the motherboard with a digital compliant one. You can't just change the thermostat. Your best bet is to put back the old thermostat or upgrade to a different compatable thermostat
Thermostat on wall, or manual controls at AC? Did it work for you on low before now? Reason I ask, is that normally they are only a 2 speed fan ( low and high) so if it's a wall thermostat and has been changed from original, perhaps it the way the thermostat is wired.
Hi, sounds to me like the thermostat is at fault.You have done nothing wrong to it but cover it up. The t-stat is what controls it, turns it on and off. The only other thing that would keep it on all the time would be that the thermostat wiring could be touching together from the stat up to the unit. You might check that before replacing stat. I have seen this many times.You can start the unit and go up top and disconnect the stat wire and it should stop the unit.Then its either the wire or stat.Let me know what you find, Sincerely,Shastalaker7
a. Remove the cover of the thermostat. b. Connect the RED wire from the air conditioner to the “RC” terminal on the thermostat. c. Connect the “YELLOW” wire from the air conditioner to the “Y” terminal on the thermostat. d. Connect the “BLUE” wire from the air conditioner to the “H” terminal on the thermostat. e. Connect the “ORANGE” wire from the air conditioner to the “G” terminal on the thermostat. f. Push the thermostat wires into hole in wall and fill excess hole with insulation. g. Mount thermostat base to the wall with screws provided. h. Check all thermostat wires on base to ensure they are completely clear of the bimetal coil of the thermostat. Adjust if necessary. i. Replace thermostat cover. If nothing operates on the air conditioner, remove the return air grille assembly and verify the red, orange, yellow and blue wires are properly connected (red-to-red, orange-to-orange, etc.). Next, disconnect the red wires and check for 12 volt DC between the red wire from roof section and the orange or blue wire from roof section. If no voltage received, refer to Section F2. If voltage is received, the problem lies with the thermostat or thermostat wires. Next, disconnect all 4 wires (red, orange, yellow and blue) from the thermostat. With the thermostat set on COOL mode, FAN mode set on AUTO and HIGH, and temperature selector set lower than the room temperature. Check for continuity between terminal RC (red wire) and terminal G (orange wire); and RC (red wire) and terminal H (blue wire). If continuity is achieved on each, proceed with the next step. Set fan switch to LOW. Continuity should NOT be present between terminal RC and Terminal H, but present between the other terminals (Y & G) and terminal RC. If all of the previous checks are good, the thermostat is good, do not replace it. If any one of the previous checks are not correct, replace the thermostat.
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