Golden_HVAC wrote:
The 75 watt light bulb will make at the most about 3 Btu's per watt, or 225 Btu's. That is not much heat, and the open grill with 25F air entering it will take away all that heat. Also the warmer the compartment is, then the more air will draft through it. So air that is 25F warmer than the outside air will flow up to the top vent faster than if only 10F warmer than the outside air.
By blocking the side compartment with aluminum foil, or plastic wrap, then you will not have a large volume of air quickly entering the vent. Then the 75 watt light heat will stay in the compartment.
One problem is that the condenser is colder than the inside temperature. Normally a 100F condenser requires about 110 PSI freon to change over to a liquid, and this high pressure liquid flows through the tiny tubing into the evaporator because that pressure is less, say 0 - 4 PSI. When the condenser is 50F, then the pressure is only about 50 PSI, and less will flow into the indoor coils. At 10F, then very little freon will flow inside, the tubing is sized more to flow the correct amount while the outside temp is at least 70F and the pressure difference is over 60 PSI.
Good luck,
Fred.
You nailed it. I upped it to 135 watts and the compressor is functioning again. Temps are dropping.
Now to figure out an easy on/off insulating material to block the grill openings in that panel on the inside. Reflectex on Velcro?
Thanks,
Bill
