## How do you read a Goodman model number?

Goodman serial numbers are 10 digit numerical where the month and year are encoded in the first 4 digits. The year is the first 2 and the month the second 2. For example 1404123456 is manufactured is April 2014. Modern Rheem systems use two styles of date encoded in the serial number.

**How do you find the tonnage of a Goodman model number?**

You can determine the tonnage of your Goodman air conditioning by dividing the BTU by 12,000. If the information about the BTU is not available, you can check the model number. You will find 0 and two-digit even numbers ranging from 18 to 60. Then divide the digits by 12 to get the tonnage.

**How can I tell how old my Goodman AC unit is?**

Goodman Air Conditioners and heat pumps will always have the first two numbers of the serial number as the year of manufacture. The first two numbers in the serial number are 14, so this unit was manufactured in 2014.

### What tonnage is my AC unit?

Simply divide the BTUs by 12,000 to calculate the tonnage of your unit. For example, if your air conditioner is 36,000 BTUs, you have a 3-ton unit. Some manufacturers bury tonnage or BTU information in their model numbers. Look for an even, two-digit number between 18 and 60.

**What does it mean when the red light is flashing on a Goodman furnace main board?**

Signal issues If your Goodman furnace cannot receive a signal from the thermostat and won’t operate, your furnace LED will give a single red flash, after which it will steadily stay on. Make sure to check the connection and your thermostat settings if this happens.

**Where is the reset button on a Goodman?**

Where Is It? The reset button on a Goodman air conditioning system should be on the outdoor air conditioning unit close to where the tubing is welded on the AC system. This is a high-pressure switch that trips if the air conditioning unit gets heated, so assess and inspect the coil for dirt, etc.