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Atlas PeakHeating & CoolingDispatch(860) 555-0121

Symptom guide

Before you call: what it probably is, and how fast to move.

Written by technicians for homeowners. Nothing here asks you to open a panel or touch wiring. When in doubt, call.

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Safety first. Phone, do not send a form.
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Worth fixing soon, not an emergency.
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No heat

Heating

Usually caused by

  • Failed igniter or flame sensor
  • Tripped safety limit from a clogged filter
  • Thermostat or power fault

Safe to check

  • Thermostat set to Heat and a few degrees above room temperature
  • Furnace power switch on (it looks like a light switch near the unit)
  • Filter not packed with dust

If it is below freezing outside and the house is cooling fast, call instead of sending a form.

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Not cooling

Cooling

Usually caused by

  • Failed capacitor or contactor
  • Low refrigerant from a leak
  • Frozen indoor coil from restricted airflow

Safe to check

  • Thermostat set to Cool, fan on Auto
  • Outdoor unit breaker and disconnect switch on
  • Return grilles not blocked by furniture

If you see ice on the copper lines, turn cooling off and run the fan only until we arrive.

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New noise

Either

Usually caused by

  • Worn blower motor bearing
  • Loose panel or ductwork
  • Debris in the outdoor fan

Safe to check

  • Note when it happens: start-up, running, or shut-off
  • Record a short video if you can do it safely

Grinding or screeching that gets louder is worth a call today rather than a booking.

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Water leaking

Either

Usually caused by

  • Clogged condensate drain line
  • Failed condensate pump
  • Cracked drain pan

Safe to check

  • Turn the system off to stop more water
  • Move anything stored near the unit
  • Check whether the condensate pump has power

Water near electrical connections is a reason to switch the system off at the breaker.

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Turns on and off

Either

Usually caused by

  • Oversized equipment
  • Dirty flame sensor
  • Thermostat placed near a heat source

Safe to check

  • Time a few cycles: how long on, how long off
  • Replace the filter if it is dirty

Short cycling wears equipment quickly, so it is worth fixing even when the house feels fine.

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Burning or gas smell

Heating

Usually caused by

  • Dust burning off at first start (brief and normal)
  • Overheating motor or wiring
  • Gas leak

Safe to check

  • Gas smell: leave the house and call the gas utility or 911 from outside
  • Electrical smell: turn the system off at the breaker

A gas smell is an emergency for the utility first. Call us after the house is safe.

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