I have a ptac that the heating coil is not heating up. The heat pump works, the temp reader works. the heating coil is being sent power and there is a circut through the coil. Any reason why this isnt working?
How much power is the question. Remember, heating coils usually require 240 volts. You likely are only getting 115 due to a faulty limit switch. 115 will carry through to the other side of the switch from the coil side leading you to believe the switch is good. Remove both sides of switch and test continuity.
SOURCE: Amana PTAC
Sounds like if this is a heat pump, maybe it tripped out on high pressure. Maybe just unplugging the system may reset the control boards. This maybe due to a dirty filter or dirty evaporator coil.
SOURCE: Amana PTAC PTC093A35AA won't blow heat
The reset button is located behing a panel on the front of the unit that is labeled Heat Reset. If that label is gone then look around, it is a small hole, small enough for a paper clip to fit through.
That being said, I have 137 of these units in one of my hotels and have not had a single one needing to be reset. You probably are going to need a new control board kit. These can be purchased from Amana. They are $130. Make sure that you have pulled the heater coil out and inspected it first. Also, there was a recall years ago where Amana was supposed to contact and send out new voltage switches. These are the round black things that the Brown heater wires connect to on the upper and lower side of the heating coil. You should also try to replace those if you find the coil in good condition. I have had those resolve heating issues. Most of the heating issues were a result of a bad relay on the control board though.
Please remember to rate this fix.
SOURCE: Amana Heat Pump Emergency Heat will not come on
On the heating element [behind the coil, (the springy thing)], at the top end of the element, there is a little thermistor I think it is called. You will have to remove the fan shroud. With the power off, check for continuity if you have a multimeter. If that is the problem (no continuity), you can pick one up at al local heating supply. Just have it soldered back in and reconnect. If the thermistor 's continuity is okay, remove the main board under the control knobs. I have seen these boards burn in the back where the relays are soldered on. If you're really good with a solder you can try to re-solder it. If not, it's about as cheap to buy a new unit as it is to buy the board. Good luck.
SOURCE: Amana PTAC
I know this is late but I had to add a solution to this problem since I had the exact same problem and was able to solve it. The probelm is not your control board. On these units, the heat pump compressor will not kick in unless the temperature you set on the control panel is within 2-1/4 degrees (or 4 degrees depending on your unit model. Otherwise, the unit locks out the compressor until the electric heat coil bring the indoor temperature up to that level - and then will switch the compressor back on for heat pump operation. So the problem is not the control panel or the compressor, it the electric heat coil. The coil has two manual limit switches on it that may be tripped and should be checked. The coil can be easily accessed by shutting down the power, removing 4 screws around the air outlet, pushing the screen up and sliding the panel out the top. The power wires can remain in place while the limit switches are reset. Hope it works.
166 views
Usually answered in minutes!
×