Lexington's heating & cooling company since 1990

Tip: If it's gray and you can't see light through it, replace it. A clogged filter causes more problems than anything else. See Air filters: how often and why.

Tip: The size is printed on the edge of the filter. With it, our technician can bring the right filter.

Tip: Set the thermostat fan to On and hold your hand a few inches from a vent. Check a couple of rooms, then set the fan back to Auto.

Tip: If the fan isn't spinning but the unit is humming, set the thermostat to Off until we arrive. Running it that way can damage the compressor.

Tip: If there's ice, set the thermostat mode to Off and the fan to On. The blower will thaw it before we get there.

Tip: The drain pan sits under the indoor unit. When it fills, the float switch shuts the system off on purpose to prevent a leak. If it's full, turn the system off and tell us.

Tip: Look for a low-battery symbol on the screen. If you see one, change the batteries.

Tip: On runs the blower all the time, so you'll feel cool air between heating cycles. Auto fixes that.

Tip: If it's gray and you can't see light through it, replace it. A clogged filter causes more problems than anything else. See Air filters: how often and why.

Tip: The size is printed on the edge of the filter. With it, our technician can bring the right filter.

Tip: Set the thermostat fan to On and hold your hand a few inches from a vent. Check a couple of rooms, then set the fan back to Auto.

Tip: Look for a low-battery symbol on the screen. If you see one, change the batteries.

Tip: The drain pan sits under the indoor unit. When it fills, the float switch shuts the system off on purpose to prevent a leak. If it's full, turn the system off and tell us.

Tip: If it's gray and you can't see light through it, replace it. A clogged filter causes more problems than anything else. See Air filters: how often and why.

Tip: The size is printed on the edge of the filter. With it, our technician can bring the right filter.

Tip: The drain pan sits under the indoor unit. When it fills, the float switch shuts the system off on purpose to prevent a leak. If it's full, turn the system off and tell us.

Tip: Melting ice can overflow the pan. See AC running but not cooling.

Tip: If it's gray and you can't see light through it, replace it. A clogged filter causes more problems than anything else. See Air filters: how often and why.

Tip: The size is printed on the edge of the filter. With it, our technician can bring the right filter.

Tip: A burning-dust smell the first time the heat runs each fall is normal if it fades within an hour. So is a whoosh and some steam from a heat pump in winter.

Tip: The size is printed on the edge of the filter. With it, our technician can bring the right filter.

Tip: Light frost that comes and goes is normal. Don't chip at the ice; the coil damages easily.

Tip: If your thermostat has an Emergency Heat setting, switch to it until we arrive. It costs more to run, so only use it until the repair.

Tip: If it's gray and you can't see light through it, replace it. A clogged filter causes more problems than anything else. See Air filters: how often and why.

Tip: The size is printed on the edge of the filter. With it, our technician can bring the right filter.

Tip: Open them fully and move anything covering them, including the larger return grilles.

Tip: Set the thermostat fan to On and compare those rooms with a room that feels comfortable. Set the fan back to Auto when you're done.

Tip: If it's gray and you can't see light through it, replace it. A clogged filter causes more problems than anything else. See Air filters: how often and why.

Tip: The size is printed on the edge of the filter. With it, our technician can bring the right filter.

Tip: If it's gray and you can't see light through it, replace it. A clogged filter causes more problems than anything else. See Air filters: how often and why.

Tip: The size is printed on the edge of the filter. With it, our technician can bring the right filter.

Tip: On runs the blower all day. Auto runs it only while heating or cooling.

Tip: Emergency heat costs much more to run. Switch back to Heat unless we told you to use it.

Tip: If you see a low-battery symbol, change the batteries.

Tip: The drain pan sits under the indoor unit. When it fills, the float switch shuts the system off on purpose to prevent a leak. If it's full, turn the system off and tell us.

Tip: The size is printed on the edge of the filter. With it, our technician can bring the right filter.

Tip: The size is printed on the edge of the filter. With it, our technician can bring the right filter.