Amana PTAC Not Heating

Bluco Mechanical is an expert in ptac heating repair in manhattan. We are also dealing in split ac so for information, call  (929) 447-2077.

Packaged Terminal Air Conditioners (PTACs) will, like any other HVAC equipment, require maintenance. You can troubleshoot your Amana PTAC device to get it back up and running. Other difficulties with PTACs may be more sophisticated and require a service technician.

Fortunately, Amana PTACs have a diagnostic feature that uses a coding system to identify potential maintenance concerns. Some of these codes may be recognizable to HVAC technicians. The solutions to these problems may surprise you.

amana ptac heating

Amana Heater is Not Working

We’ll also discuss some troubleshooting techniques and recommendations to keep your machine running smoothly.

Mode Design

To get an error code from your PTAC, you must first put it in diagnostic mode. This allows the unit to detect faults and generate a code describing its present status.

Steps to put the machine in diagnostic mode:

  • Hold the UP (+) and DOWN (-) arrows.
  • Hold the arrows and press “COOL” twice.
  • If done correctly, the machine will enter diagnostic mode. A red dot will flash in the display corner.
  • Instead of numbers, there will be dashes (– – ) or a diagnostic code. There may also be a green status indicator in the touchpad’s lower-left corner, below the “OFF” button.
  • Notifications of error active failure, mode, or lockout are indicated by dashes on the display (– – ). No error code appears. There may be a maintenance issue, but no diagnostic code to indicate it.
  • It will display one of the following codes if it detects an error or active failure.

Error Codes and Fix

Your system may display one of four maintenance codes. The diagnostic function on your Amana PTAC can detect system modes, faults, airflow alarms, and refrigeration alerts. If you’re worried about your PTAC then contact ptac air conditioning repair manhattan.


Your unit has certain operating states or system modes for safety, security, or compatibility. Each will show a unique code. While not necessarily maintenance issues, these modes can cause your machine to malfunction. Changing settings or upgrading the unit’s surroundings can typically fix system issues. Call Bluco Mechanical experts when your Amana PTAC not heating.

FP – Freeze Defense

The code “FP” represents Freeze Protection. The thermostat or thermistor detects temperatures below 40°F. This prevents harm from freezing. Once the thermostat or thermistor reaches 43°F, the machine will exit Freeze protection.

Fd — Front Desk

It signifies that the front desk switch is closed. That is, the unit’s outputs are all off. Ask the front desk to reopen the switch so the device can resume normal operation.

Eo – Invalid Service Board

The code “Eo” indicates a misconfigured service board. To remedy this, you must alter the unit’s setup settings in the menu. If it says “C3,” change it to “C.” This includes PTAC units with electric heat. Change the setting to “H” for heat pumps.

EH = Emergency Hydronic

The code EH indicates Emergency Hydronic mode. That the compressor is off and the EHH switch is closed. Close the emergency hydronic switch to exit this mode.

LS: Load Shedding

In this case, “LS” means “Load Shedding”. This turns off the compressor and the electric heat. The LS switch is off. To exit this state, just re-open the unit’s LS switch.

On–Wired Thermostat Setup

When the unit is set up to work with a wired thermostat, the code “On” shows (instead of a wireless one). Using the unit with a wireless thermostat will result in a configuration error. To remedy this, you must modify the configuration mode in the configuration menu.

Open Door/Window Lockout Mode

The codes “oP” or “nP” show if the sensor detects an open door or window. This may force the unit to shut down completely to save energy. Close the door or window to restore normal operation.

Heat Sentinel (HP)

The code “HP” denotes Heat Sentinel mode. Heat sentinel mode, like freeze protection mode, guards against overheating. It may also activate a proactive cooling function. The unit should automatically exit this mode once the room temperature or the unit itself has returned to normal.

Ur – Non-Rented

The code “Ur” means “Un-Rented”. This may cause problems with the unit. To alter the status from “Un-Rented” to “Rented,” contact the expert. Not all units are affected.


Failure codes indicate that a component of the unit has “failed.” To resolve these issues, you must either replace or repair the faulty component. While these codes can not detect all problems, they can help with some frequent ones.

1. Thermistor/thermostat failure

“F1” usually means “double failure”.

  • The Indoor Ambient Thermistor (black) reads outside of the range (-20°F to 200°F).
  • The wireless thermostat stops transmitting signals to the unit control. Replace the black thermistor and/or the wireless thermostat to fix this issue.

2. Wireless Remote Thermostat F2

The Wireless Remote Thermostat has failed (F2). Replace it as a solution.

3. Thermistor (Black) Indoor Failure F3

F3 indicates that the unit’s black Indoor Ambient Thermistor is reading outside its preset range (-20 °F to 200 °F). It will need to be replaced.

4. Thermistor Failure (Red) F4

The red Indoor Coil Thermistor has failed or has surpassed its operating tolerance. In this scenario, it must be replaced.

5. Wireless Thermostat Failed

The code “F5” indicates a wireless thermostat failure. To repair this, either rebind the thermostat or replace it.

6. Input Discharge Thermistor Failure (Yellow)

A yellow Indoor Discharge Thermistor failure causes the F6 code. Also known as operational tolerance. In this instance, it must be changed.

7. Low Remote Battery

The code “Fb” indicates a low PTAC remote battery. In this scenario, you must replace the device’s battery.

8. Hi-Voltage Safety (H1)

The code “H1” usually indicates an excessive input voltage. Check the unit’s voltage and adjust accordingly. Higher voltages might cause severe shocks, therefore use extra caution when monitoring your unit’s voltage. You could also require an electrician.

9-Brown Out Defense

When the unit loses power or the voltage is too low, the code Br appears. In this scenario, you must change the unit’s voltage. In this instance, call an electrician for safety or contact Bluco Mechanical.

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