Symptoms and safe next steps
Furnace Problems in Collierville, TN, Sorted by Symptom
Furnace acting up this winter: call us for a local HVAC company.
Furnace problems in Collierville sort into the 7 symptoms below, from a furnace that does not start to a carbon monoxide alarm. The Collierville weather station logs 74.5 nights at or below 32°F in a normal year, and January's mean low is 29.1°F.
On each symptom page, the owner checks come only from a manufacturer, a gas utility, or the CPSC. After those, we describe what the HVAC company tests and which question to ask first.
Symptom Pages
Pick what you see, hear, or smell. Gas smells and carbon monoxide alarms come with the utility's and the CPSC's own steps.
- Furnace Not Turning On
The 2 checks the manual leaves to you, then the ignition tests a local HVAC company runs when the heat stays off.
- Furnace Blowing Cold Air
Why the blower runs with the burners off, and the limit and airflow tests a local HVAC company runs.
- Furnace Short Cycling
What a high-limit shutoff means, the airflow and flame checks behind it, and when sizing enters the repair.
- Furnace Making Noise
Furnace sounds sorted by the stage they start in, and the part a local HVAC company tests for each one.
- Furnace Smells
Gas smell steps from the local gas utilities, plus what a local HVAC company inspects for dust or burning odors.
- Carbon Monoxide Alarm and the Furnace
The CPSC's alarm steps in order, then the combustion and venting tests that come before the furnace restarts.
- Furnace Ignitor and Pilot Problems
The ignition order from switch to flame, the parts a local HVAC company tests, and what moves the price.
Signs That Mean You Leave the Furnace Off
A gas smell or a carbon monoxide alarm means you leave the furnace off and follow the source's steps. MLGW tells customers who smell gas to leave and call its emergency line from another location. When a CO alarm sounds, the CPSC tells you to get to fresh air and call 911.
The furnace smells page lists both utilities' steps for Shelby and Fayette County homes. Once the utility or fire department clears the home, we get a local HVAC company on the line to test combustion and venting.
Symptoms That Trace Back to Airflow
Cycling and noise trace back to airflow more than once in the manufacturer's manuals, which tell you to check the filter monthly. A clogged filter can trip the limit switch, which shuts the burners off while the blower keeps running.
The furnace short cycling and furnace making noise pages explain what the HVAC company measures next. For a furnace that runs but heats nothing, start with our furnace blowing cold air page.
Symptoms That Trace Back to Ignition
A modern gas furnace lights in a fixed order, per the manufacturer's manual. The pressure switch closes, the hot surface igniter heats, the gas valve opens, and the flame sensor proves flame. A break at any step leaves you without heat.
The furnace ignitor and pilot problems page follows that sequence part by part. More symptom answers sit on the furnace and AC questions page.
Give us the symptom, any error code, and whether an alarm sounded, and ask the HVAC company which part it tests first.
(901) 613-0388This page relies on 6 public documents, such as records from NOAA, Memphis Light, Gas and Water, and CPSC. Find each one and its check date in the records behind each page list.
Morton Furnace Repair
Reach a Heating Company That Serves Collierville
Describe what your furnace is doing, and we put a local heating and cooling company on the line with you.
Call us for a local HVAC company.