Heating/cooling unit- Run for a certain minute then it turn-off
We have a roof heating/cooling unit carrier model no. 48tje006, ser.No. 3499g21132 and it prompts at the panel 4 red light flushing means- "4 consecutive limit switch faults". What does it mean this problem? It is the thermostat problem need to replace?.Please answer and give me an idea howto solve.
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the unit works by chilling air and the byproduct is heat in the compressor, this is used for heating in the winter and then reversed in summer to blow cold air. It has to blow cold and warm up before it can blow heat.
You are <b>building a log home</b> or a home that you want the rustic look of the <b>floors above also being the ceiling of the floor below</b>. You hate the thought of having to install ugly <b>heating and air conditioning ductwork</b> in your new home. For you there is hope. You can still have a comfortable home and have the look that you want.<br />
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If you are concerned about the looks on the outside, that too can be fixed rather easily. The <b>piping and wiring going to the indoor units</b> is relatively small and can be hidden in many ways by using a little imagination. Colored aluminum can be fabricated to cover the pipes. I have also run the piping through rain spouting and made it to look like just another rain spout coming off of the roof. <br />
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Could be over heating and the unit shuts down till it cools off. Check the dryer vent line for clogging all the way up to the vent by the roof. Bet it is clogged some where and that is the cause of your problem.
Seems like the fan relay has stuck (Likely to be on the main indoor PC board) or if the machine was being used on heating mode, the indoor pipe sensor may have failed causing the fan to continue to run. Most air cons on heating mode, will keep the fan running for a few minutes after you switch off on heating mode to cool down the indoor unit before it turns off completely. The pipe sensor signals the main PC board to tell it that the unit has cooled down and can now turn off completely. If either of the above faults occur, the indoor fan will keep running all the time.
quite likely your microwave is trying to prevent it self from self destruct, because if the fan is not keeping the electronics components cool enough while its running the high limit thermo will disconnect power from the heating circuit, if the fan is not working it should be replaced , that's a techs job.
If the air conditioner compressor runs all the time the main control board might be defective. The main control board provides the voltage to the fan motor and compressor. These boards are often misdiagnosed. Check all other components to be certain this is the cause of the problem.
1. pull the unit out from the wall
2. Remove the screws holding on the larger rear panel.
3. Using a vacume cleaner extension, remove as much debris as possible from all accessible components.
4. Clean out the dryer vent and the connection to the wall, making sure that air can pass easily.
THAT SHOULD DO YA. If the heat continues to cut off, you are dealing with a faulty heating element in which case you will be best off to purchase a new dryer. (replacing a heating element is typically the beginning of a failing unit)