It is wired with 10 ga from the main panel to … The compressor data plate says: 23A minimum draw, 40A max breaker. This is actually a common problem, often associated with large outdoor A/C units that can draw up to 100+ amps when first turned on. When your lights dim a little bit when the AC kicks in, and the lights dim just a little, your system should be fine. The longer you own your AC … Note: We use CFL light bulbs. How to diagnose the causes of flickering or dimming lights at or in buildings. Loose Wiring Connections. They flicker very briefly just when the pressure switch kicks in and the pump starts. They 'flicker'. They do not dim. The normal flickering that occurs when there isn’t enough power to support all appliances in your home should last a fraction of a second. It appears to happen to any of the lights in the house. Most homes have only a 200 amp main electrical service, so this draw can cause a brief flickering. It could be normal because when the compressor kicks on it does take a big momentary current draw, and typically lights will dim. Lights that continue to flicker. Tested using the breakers at the panel shutting the AC units on and off, and both also cause flickering of the lights when turned on which would probably explain the random flickering. The new pump [as I was told by the installer] is a slow start pump and draws less than 5 AMPS at full running … This article gives simple diagnostic steps that a homeowner can do to determine the type of electrical system problem that is causing flickering or dimming lights … Flickering Lights & Intermittent Electrical Power Loss Diagnose & fix flickering or dimming lights or lost electricity. Your air conditioner capacitor provides your compressor with the energy it needs to start up. Some of the major contributors are the heat-pump compressor. Periodically when either the furnace kicks in, or if another appliance is turned on the lights will flicker. If they are on the same line as the lights, that will easily make them flicker once. This morning a repair tech was here to fix our central air conditioner and he was concerned that the basement lights flickered quite a bit after the central air kicked on after he fixed it (finished basement with recessed lights). However, flickering lights can also be an indication that there is a larger issue with your electrical system, in which case ignoring the issue can have serious consequences … Lights in the home only flicker when a large appliance (such as the air conditioner) kicks on. The problem may be systemic or found in only one location, … I get a momentary flicker of lights when my AC compressor kicks on- it's just long enough to notice, a split second. Loose wiring can not only cause flickering lights, but is a leading cause of house fires. There is no way to tell without someone checking your panel and wiring. If your lights continue to flicker on and off when you start your HVAC system—or continually at any other time—you could have an issue with your … AC units are split with one on each side. The reason the lights dim is because the COMPRESSOR on the AC unit requires a lot of energy to start which reduces the amount of energy going to the rest of the house. So when the refrigerator, freezer, washing machine or furnace fan kicks in, there is a large electrical surge. If lights are flickering at your neighbors’ houses, too, there might be a problem with the electric utility service itself. Your electric service can only handle so much electric load at a time and sometimes machines (especially ones with large motors or compressors) require … Flickering lights or household lights that dim periodically can be a nuisance, but usually there is a benign cause behind the flickering. 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