If your Friedrich air conditioner is part of a PTAC system and it is displaying an A2 error, there is an issue with the power supply to the heater.
PTAC systems can be very beneficial in terms of greater temperature control and greater savings on your electricity bill, but they are not perfect.
If your Friedrich air conditioner (AC) that is part of this PTAC system is displaying an A2 error code, this indicates that there is an issue with the power supply to the heater.
The benefits of PTAC units
A PTAC unit or Packaged Terminal Air Conditioner is a standalone unit that heats and cools and that can be installed through the wall. These units are growing in popularity, because they offer so much in terms of temperature control in your space.
This PTAC system not only helps you maintain your ideal temperature within a space, but it also gives you greater control over how much you spend on electricity every month.
PTAC units are extremely energy-efficient when they work correctly, and this can also help to lower your carbon footprint.
Friedrich air conditioner error code A2
Friedrich is one of the air conditioner manufacturers that have been focused on creating PTAC systems, which are quite energy-efficient to operate.
However, even though these PTAC units can be so beneficial when they are functioning correctly, when your Friedrich air conditioner is not working quite like it should, it can also be quite inconvenient and frustrating.
If your Friedrich air conditioner is part of this PTAC system and it is displaying an A2 error code on its control panel, this means that there is a problem with the heater and your air conditioner has shut off to protect you and your space, but also to protect the other electrical components in the unit.
The most likely cause of this A2 error code on your Friedrich air conditioner is the power supply to the heater.
If there is an issue with the voltage or amperage of the power that is coming into the air conditioner, this will cause the A2 error to display, as your unit will try to maintain heater safety even though there may be a short in the circuit at some point.
You can investigate this issue yourself using an electric multi-meter to compare the amperage of your unit with the amounts specified in your owner’s manual.
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You can also look for any other signs of damage on the electrical components, or you can call a professional to help you if you are unfamiliar with working with electrical components.
The A2 error can also sometimes be triggered by signal interference from other appliances, so if you cannot find any evidence of a short circuit or a loose wire, you can try to do a quick reset of the system, to see if this clears the error up.
Normal amperages for Friedrich air conditioners
Friedrich air conditioners are designed to compensate for some fluctuation in voltage and amperage as the unit operates.
However, if your air conditioner reaches a value that is 10 percent below or above the following normal voltages and amperages for Friedrich PTAC models, then there is most likely a problem with the power supply to your AC unit.
| Measurement | Value under normal operating conditions |
| Amperage of a single electric heaters |
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| Amperage of a combined electric heater |
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If the amperage between the L-line and N-line is more than 2.5 A, the A2 error will also be triggered, and your unit will not operate.
Other causes for the A2 error code in Friedrich air conditioners
There are many possible issues that can cause a short in the circuit of your Friedrich air conditioner and that may have led to the A2 error code, such as:
- The heater is open
- The display panel or logic board is faulty
- The fan of the indoor unit is damaged
- The main PCB has detected a current leak
- The wires on the control board or heater harness are loose or damaged
How to reset your Friedrich air conditioner to get rid of the A2 error code
If the A2 error code was not caused by an interruption of the power to the heater component of your PTAC system, and it was caused by some other issue, like interference from another appliance, you can clear this error code by simply resetting the unit.
To do this, you need to unplug the unit for a few minutes, and then plug it back in and switch it on again.