A/c unit runs continually even when thermostat control says off
The unit outside has 2 boxes. One has set of 3 buttons that says ''on'' and ''off''. The other box has something that looks like a breaker that says pull for ''off''. Until I can get a repairman, is it o.k. to push the set of 3 buttons to off and not bother the other box. I'm sure my electric bill will be high if this runs all weekend.
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Double check your batteries in both the outside and inside units changing the outside ones FIRST before you change to reset the inside batteries, IF you have two separate units. If this doesn't help, it could be the control switch/relay for your interior unit. Please go to your browsers information line and type in DOMETIC CORPORATION.COM AND SEARCH FOR YOUR SPECIFIC THERMOSTAT by entering your CCC2 Comfort Control Center 2 information. They should have a help section at this website.
I hope this helps. Check to see if its still under warranty.
I believe the unit you are describing is a heat pump. Heat pump are great when the temperature isn't below 30 With low ambient temps. outside it is much more efficient and comfortable to run aux. electric heat from the heat pump.
outside unit L1 and L2 are load (input 240vac) then you have control voltage, usually yellow and blue (24vac) this connects to some 18/2 thermostat wire which goes inside as white and red.
note: this unit may only need 24v control which is 2 wires from the inside unit and also 3 wires 2 hot 1 ground for line voltage.
STANDARD WIRING on the inside unit you have green, white, blue and red control wires.
on your thermostat you have white, red, yellow and green
you run the wire from the outside unit to the inside unit. then run a 18/4 wire to the thermostat if wired and join the following wires.
inside unit thermostat outside unit green------------------------green white-------------------------white red----------------------------red blue-------------------------------------------------------blue yellow--------------------yellow
Check your wiring behind the thermostat. If you have two wires touching, it will cause this. If everything is ok. Check inside blower compartment for the low voltage wiring. This is your wiring from your thermostat. Make sure none are touching. This would typically be your yellow wire that controls outside compressor.If not any of this you need a new stat.
Here is the troubleshooting guide for your unit. Hope this helps.
TROUBLE SHOOTING GUIDE TROUBLESHOOTING Symptom Remedy 1. Remote does not turn on system - Check and replace remote batteries if the display fades while any button is activated or no display is present. - Point remote towards IR receiver during transmission. 2. System does not turn on, no green LED & no beep - Check wiring. (see "installation instruction") - Check modular cable to receiver. - Check diagnostic LED status in the upper unit control box. 3. System does not turn on even when receiver green LED is on. - Low or over voltage condition, check diagnostic LED status in the upper unit control box.
4. Fan runs but no cold air. - Evaporator temperature sensor reaches low limit, defrost mode. - Check diagnostic LED status in the upper unit control box. 5. System runs continuously in the cool mode - Remote was set for "I feel" mode and is left in a heated environment (sun etc.) 6. System runs continuously in the heat mode - Remote was set for "I feel" mode and is left in a cool environment
1. Diagnostic LED (green) (Note: Located on the control board in the upper unit control box.) a) The LED is on when the 12VDC is adequate and communications are present. b) The LED is flashing fast and steady when in the freeze mode. Evaporator has frozen and the freeze proctection switch is engaged. c) The LED is flashing slow and steady when the delay on break timer is activated. d) The LED is flashing 1 cycle on and off for one second with high or low 12VDC. Check the incoming 12VDC power for OK. e) The LED is flashing 2 cycles on and off for one second with a communication problem. Problem with the control board in the unit and the remote.
Hi, Sounds like you have a short in the control circuit to me. Turn off all power going to the unit. Write down or otherwise mark the wires leaving the control board going to the thermostat. Remove them from the control board. Replace the fuse. Turn power back on and see if the fan still runs. If it does, check and or replace the heat limit switch that brings the fan on during the heat cycle. It may just need adjusted. If the fuse blows, I would think that the control board is probably bad. If it doesn't blow, Remove the thermostat. Leaving all thermostat wires open check them with an Ohm meter. There should be no continuity between them. Twist all the wires together at one end and ohm them again at the other end. You should have complete continuity on all wires. If the wiring checks out, down power the unit. Double check your wire colors and rewire the control board. With all wires open at the thermostat, turn the power back on. Touch the RED wire to the YELLOW wire. The Condensing unit should come on. Touch the RED wire to the GREEN wire. The fan should come on. Touch the RED wire to the WHITE wire. The heat should come on. Down power the unit. Replace the thermostat. Test unit. If the fuse has lasted ok but blows now it is either wired wrong at the Thermostat or the thermostat is bad. I hope I have helped. NOTE: If you can not understand these instructions. Call a licensed Heating / Air conditioning company.