AboutHoward Livingston Expertise Can answer questions on electrical control circuits, power supply,airflow & distribution, electrical components,refrigerant problems,gas, electric & propane furnaces.No boiler or refrigerator or oil fired furnaces experience.Just HVAC questions please.
Experience 35 years experience in residential & light commercial repair & installation.
Question QUESTION: Big fan doesnt always come on when air condition is running on outside gas heat and air? Is this due to the air condition freezing up? Or what?
ANSWER: That inside fan is turned on, on cooling by the thermostat. You have a digital thermostat ? May be the problem.
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QUESTION: No digital thermastat. Sometimes I can turn thermastat fan to "on" not automatic and it wont come on. Sometimes it come on fine. Its like when the air runs a long time, everything is fine then the fan that blows the air inside stops working but air vents are cold but very little air comeing out. Then I turn off for several hours and same thing starts all over again. Like it freezes up and stops working then it thaws and WORKS AGAIN! Thanks, C~
Answer Whoa ! A different picture ! It's icing over the evaporator coil, blocking the air flow. Probable cause is low on freon. Or a dirty filter. Or even a clogged evbaporator coil with dirt that has btpassed the filter. Just lack of airflow across the coil. Need a little testing to discover which one it is.
