Had similar issues this last weekend with our A/C. Last time this happened, it turned out to be the motor was fried. This time, noticed the problem when the house was warming up but the compressor was running. Checked and found the fan wasn't. Jumped on it before the coil iced up. Found a couple of problems that caused the fan motor to run intermittently. The furnace has a button switch that cuts ac power when you remove the access panel. Jiggling it caused the power to flicker off/on. Appears to be bad contacts. Jumpered the switch temporarily. This improved the situation. But also found that opening the door on the programmable thermostat or pressing buttons would cause the fan to flicker off/on. Suspect to be poor contact on the "FAN" signal in the thermostat. Disassembly & repair (if possible) of the thermostat is next step. Otherwise, replacement.
Just wanted to point out that there can be a couple of other things that cause the fan to run intermittently, which reduces air flow and promotes icing. Also, put your hand on the A/C lines running into your furnace. Should be noticable difference (hot/cold) between the 2 lines.
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Today's Featured Article - Identifying Tractor Smells - by Curtis Von Fange. We are continuing our series on learning to talk the language of our tractor. Since we can’t actually talk to our tractors, though some of the older sect of farmers might disagree, we use our five physical senses to observe and construe what our iron age friends are trying to tell us. We have already talked about some of the colors the unit might leave as clues to its well-being. Now we are going to use our noses to diagnose particular smells. ELECTRICAL SMELLS
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