No heat all functions work but does not heat

There are several possible reasons why you may be experiencing cool or no heat in your 2002 Jeep Grand Cherokee Laredo after replacing the thermostat and bleeding the air out of the lines. Some possible causes could include:

1. A malfunctioning blend door or actuator: The blend door controls the mix of hot and cold air that is directed through the heating system. If the blend door or actuator is not functioning properly, it may cause a lack of heat.
2. A clogged heater core: The heater core is responsible for transferring heat from the engine to the cabin of the vehicle. If the heater core is clogged, it may not be able to transfer heat effectively, resulting in cool or no heat.
3. A faulty thermostat: If the thermostat was not properly installed or is not functioning correctly, it may cause the heating system to not work properly.
4. A problem with the water pump: The water pump is responsible for circulating coolant through the engine and heating system. If the water pump is not functioning properly, it may cause a lack of heat.

Based on your description, it sounds like the problem may be with the function knob itself. It's possible that the knob is not making a proper connection with the oven's control system when turned to certain functions, which could explain why the oven doesn't heat up and the light doesn't turn on. Additionally, the fact that the oven sometimes stops heating and the light turns off on its own, and then starts again when you wiggle the knob, further supports this hypothesis.
Replacing the function knob is a relatively easy and inexpensive first step to take in attempting to fix the problem. However, it's also possible that there may be a more complicated issue with the oven's control system or wiring, so if replacing the knob doesn't solve the problem, you may need to consult with a qualified technician to diagnose and fix the issue.

Based on the product specifications available online, the Noma 043-6131-0 portable air conditioner does not appear to have a heating mode or a heat pump function. It is designed only for cooling and dehumidifying a room.
If you are seeing a heating mode on the unit, it may be a different model or a mislabeled function. In any case, it is always recommended to follow the manufacturer's instructions regarding the use of the exhaust hose. The exhaust hose is necessary for venting the hot air generated by the air conditioning process out of the room, regardless of whether the unit has a heating function or not. Running the unit without the exhaust hose can cause it to work less efficiently and may also create a buildup of heat and humidity in the room.

https://www.justanswer.co.uk/appliance/94x19-coffee-maker-delonghi-esam-5500-not-producing-steam.html
https://www.youtube.com/watch?v=Yq9tBpAFHoY

is this 400c or 400f

check contact points for current. tabs might be bent and are not contacting correctly and no heat the Ni-Chrome wire heats up glow orange when currant is applied , might need a test voltage Meter and screw driver too >^.^<

It sounds as if you you have a low charge of refrigerant, r22. When the unit comes on outside, the outdoor coils become the lowside, there is a low pressure switch that is tripping out contactor protecting the compressor.

You have stated the the heat relay is not functioning. If the relay has no voltage when you set the unit to heat then the relay may not be the problem. However if voltage is present and the relay is not working then you are correct that the relay needs to be replaced.

Sounds like a bad limit switch. Open and test continuity on all limits with power off and at least one wire off one side of each

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

check magnetron, and related circuit...