I plugged the hole and cleaned off the dirt. I did notice that where the freon line comes in through the foam housing there was daylight and the supply coil was a little dirty. I cleaned the coils and taped up the divider between return and supply. It measures the heat radiated from a solid surface. Check the temperature of the air with an analog thermometer, DO NOT use an infrared temp gun as it will not measure air temperature. The outlet should be 20 degF lower than the inlet. Now you are doing good to 7 to 10 years out of a unit.Ĭheck the temperature between the inlet and the outlet at the unit with it operating on high fan. Units from a few years back would last 10 plus years up to 20 years. It is not unheard of for a 4 year old unit to fail. It seems that Dometic ran through a bad batch of units 4 years ago and there were a bunch of failures. I did find in the online manual that the compressors are rated at 13.2 amps, so the one not cooling is a bit low. I will pick up a couple of thermometers to check the difference in temp. Best I can tell, everything between supply and return is sealed up and the coils are clean.
The units did get a little hail damage so I have spent a few hours up there with a fin comb. 20° difference, if so the unit is operating properly. Use a small thermometer to measure inside air temperature, now measure chilled air outflow. Fin combs are cheap and make it easy to straighten fins(just buy the right teeth/fin per inch).
DOMETIC BRISK AIR 2 15000 BTU INSTALL
Install new air filters, check the coils on the roof unit, insuring they are clean and fins are not crushed/bent. This allows chilled air to be sucked back into the warm return air flow. Many times the installer fails to insure the panel separating them is completely sealed. Remove the air return panel to view the return air and chilled air duct-work. Before spending money check the free fixes first. Your units nameplate states startup and running ampere draw when the unit is operating properly.
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