Coleman Evron CH/CA unit won't blow the air through the vents
I have a Coleman Evron CH/CA unit system outside of my mobile home. The heater works perfect, blows the air through the vents and everything but when I switched it over to the AC for the summer, it won't blow the air through the vents. It all comes on, the compressor , etc. but just no air blown through the vents.
Any ideas ?
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It sounds like your freezing up at the coil, which in turn, blocks airflow across coil and only a small amount of air comes out of the vents. This also explains the cold air coming from fan on the outside unit, since the system cannot absorb the heat from the inside of the house through the coil. Your air outside is usually blowing out warm to hot air because thats the heat it rejects out of your system. I would turn the thermostat to "OFF" and turn just the fan setting to "ON" instead of Auto, this thaws the system out faster. Give it time to fully thaw, make sure filters are clean, and check airflow. If airflow is back to normal, your problem is more than likely the charge of refrigerant. If you have to call a technician out, make sure the unit is not frozen at all before they get there, they would not be able to do anything with the system froze. Hope this helps and good luck!
generally speaking a sealed combustion system is inherently more safe than a system that draws it's combustion air from it's ambient location. however, it cannot be considered 100% safe in a potentially hazardous location. The actual system that would be used in a "code compliant" installation would be a 100% outside air unit.
That being said, you can install this in a garage, the vent that you are referring to (if it is a standard mobile home system) is generally directly above the unit and usually no longer than about five feet. It also requires a listed and labeled termination "cap" If you install 90 degree angles or extend the vent too far you will have issues with condensation in the piping that will cause the pipe/ heat exchanger to fail prematurely.
If the system is a 90+ efficeint unit then the PVC venting is generally allowed to be about 30 feet long, with a 1/4 inch per foot pitch back to the unit for condensation, also the general mfg. instructions allow either 2- 90 degree or 4 45 degree fittings in the line. hope this helps
If you canhere the fan running check to see if you see ice on the line going outside. If you do it is iced up . causes dirty coil,inop fan and low on gas. If unit is not ice up. Check to see if fan is running. Could be bad fan switch. also. Russ
start with making sure you have aclean filter, after that make sure the blower speed is at the proper setting when the air conditioning is on---usually either high or medium high for a fixed speed system, make sure the return air vents are not blocked or restricted as well as the delivery vents not close or restricted to cause too much static pressure ( back pressure at the delivery side can reduce air flow across the a-coil ) also make sure the insulation sheet that is usually above the a-coil is not being blown down across the a-coil entryside when the blower is on. After checking all these, if you find nothing you should start by having the pressure checked --- basically comparing the pressure at the "outside unit" to the pressure at the "inside unit" or a-coil. these are high side and low side pressures. Have you done anything else to the house----attic vents, new soffits, insulation, etc that may be affecting heat gain in the house.Is it a house, mobile home or what?