20 Most Recent Goodman CKL42AR42 Air Conditioner - Page 8 Questions & Answers

Trace the 24 volt feed to its source and you will find what's wrong.

if no voltage from control board check safety circuit if ok bad control board

On most Goodman's the three blinking lights indicate an issue with the pressure switch circuit. That can usually mean one of 4 things. 1. Your flue is blocked with debris.2. Inducer motor has failed or is not reaching proper speed to satisfy switch.3. Pressure switch or inducer connections are loose.4. Pressure switch is bad.

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is the furnace a 220v systen --is the generator large enough to run it

Relay on the board is stuck, need new control board.

When your thermostat was installed, a small sensor with transmitter was placed somewhere outside of your house, (Mine was placed under the house, zip tied to a floor joist). You need to find the sensor (about the size of a zippo lighter), open it, and replace the battery and put it back where it was.

Check to see if your furnace has an exhaust fan, if it does, make sure it is coming on. If it's not, the furnace will not light.

This can be a number of things;
1. Thermostat is not programmed properly and all your doing is rebooting it
2. Bad electric ignitor for the furnace
3. Wiring is wrong from thermostat to furnace or vice versa

it is rated at a 12

Remove the panel the codes are on the backside.

You need to have it done it will be about $30 with a handyman.

What is the problem

Yes

Replace the motor

The contactor is stuck.

What model #

Yes, kill power then turn it back on.

What is the problem with it.

Ream out the orifices where the pressure switch tubing connects, these plug of often and need reaming out t5o clear the obstruction.