20 Most Recent Carrier 52CQ-312-4 Comfort Series Heat Pump Air Conditioner - Page 3 Questions & Answers

Ingnition proving failure .Board not sencing flame . Check flame sensor is clean and check connection at board .Check gas to igniter is not blocked .

The Honeywell RTH2300 doesn't need a C-wire. See the documentation in the Installation & Setup section on the support page: https://www.honeywellhome.com/us/en/support/air/thermostats/programmable-thermostats/5-2-day-programmable-thermostat-w-change-reminder-rth2300b1038-e1/ . If your old thermostat had a C-wire, check the system board at the furnace. Make sure that the G-wire (usually green) at the thermostat is also connected to the system board's G-wire connection. First check the obvious: what is the current position of the fan switch? It should be on auto. (That's the switch on the right.) Is the temperature that the thermostat is reading match the real temperature in the room? Check with a thermometer. If the area near the thermostat is still above (cooling) or below (heating) the set temperature, the room circulation could be a factor. I know my home's thermostat keeps the A/C running for a while after a thermometer on the other side of the living room reaches the desired temperature in the evening when parts of the house are closed off. If the thermostat temperature reading is correct, the signal may not be reaching the system board. You can check that all of the individual wires between the thermostat and the system control board are undamaged. I've seen those thin wires break when you take them off one thermostat and connect them to another. Another possibility is that a relay isn't working. Contact Honeywell if the temperature sensor isn't giving the correct reading. Contact a heating and cooling repair person if the problem is with a relay or the system board. I hope this helps. Cindy Wells

No model number so not sure what you got! Could be a bad capacitor could be a bad motor.

Model number is not recognised. https://www.google.com/search?q=carrier+dk4cnb006+wiring+diagram ..

Your blower runs on 240 volts. So 3 wires are speed and 1 is the neutral. Likely white is neutral/ L2 and then you have your three speeds. So you will still have 1 spare 1 for cool 1 for heat 1 for l2/neutral. Model number of motor and unit usually helps for proper diagnostic though.

https://www.luceaircon.sg/blog-article/carrier-air-conditioner-error-codes ..

Go to www.carrier.com

read manual or look it up on google

24000 btus/ 2 ton

The E-4 is either a discharge thermistor or the Pc board, in my experiences has always been the thermistor. Hope this helps. Michael I’m happy to help further over the phone at https://www.6ya.com/expert/michael_341f3f9dee622e54

call a furnace repair service locally

Fuse is probably blown. Check thermostat wiring and electric furnace for wiring. Look for 3 amp automotive fuse in furnace and replace

You have to try resetting the system. First turn the breaker off for the condenser and wait about 20 seconds. After you turn it back on the system should reset. If that dosn't work then you should contact a professional. AC Repair West Palm Beach

no info generic answer the code for your make or model is only 4 digits look up online or call customer service for assistance

2_1/2

You probably need to get a service tech out. Here is the manual on the unit Carrier 25HNA6 Installation Instruction

4 TON

I have the same issue

The answer is yes. Chances are that the tstat you have now just hasn’t been setup properly. Don’t want to get the new tstat and have the same issue but I suppose you could try!