April 20, 2023

Heating and air conditioning articles

These heating and air conditioning articles and videos from Sears PartsDirect can help you get the most from your HVAC system. Find the answers to common questions and learn tips and tricks to keep your system heating and cooling effectively. For more DIY advice, check out our Heating and air conditioning repair help section for maintenance advice, common symptoms and their causes and step-by-step repair instructions.

Heating & Cooling Combined Units

Articles and videos common to all heating & cooling combined units

May 24, 2023
Introduction image for maintaing your air conditioner.

Learn how to maintain your central air conditioner to keep it running smoothly all summer long.

May 19, 2023
Introduction image for article on preventing AC problems.

Get tips to help keep your central AC running all summer long

January 05, 2023
Introduction image for article about replacing a gas furnace with an electric heat pump HVAC system.

Learn the reasons why you should consider replacing a gas furnace with an electric heat pump.

November 30, 2022
Introduction image for article on the new 2023 Department of Energy HVAC energy use guidelines and how they affect you.

Find out how new DOE standards going into effect in 2023 can affect you and what you need to do.

August 30, 2022
Image for intoruduction section describing Sears PartsDirect website features.

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.

August 11, 2022
Introduction image for article on the new Search Bar feature on Sears PartsDirect.

Learn about a new feature added to the Search Bar on Sears PartsDirect

August 05, 2022
Image article introducing the Sears Technical Institute.

Learn about Sears Technical Institute and the advanced technical content being developed for aspiring appliance techs.

June 29, 2022
Introduction image for Sears and Sears PartsDirect questions article.

Get answers to frequently asked questions about Sears and Sears PartsDirect.

February 22, 2022
Introduction image for furnace article.

Find out why the burner on your furnace isn't igniting.

February 22, 2022
Furnace image for HVAC parent category page

Learn about furnace repairs and how much they cost.

February 18, 2022
Image of Google Nest thermostat.

Learn the advantages of installing a Google Nest thermostat on your HVAC system.

February 23, 2016
What to check if your air conditioner isn't cooling.

If your central air conditioner isn't cooling as it should, we'll show you how to check for a tripped float switch and clogs in the drain pipe.

Symptoms common to all heating & cooling combined units

Choose a symptom to see related heating and air conditioning system repairs.

Thermostat problem, clogged air filter, burner failure
Dirty air filter, clogged condenser coils, low refrigerant charge, faulty compressor
Main causes: errant thermostat settings, lack of electrical power, clogged drain line, wiring failure, control failure.
Main causes: Errant thermostat settings, lack of power, bad interlock switches, lack of exhaust ventilation, wiring failures.
Thermostat problems, bad compressor/condenser fan capacitor, lack of refrigerant, failed compressor
Dirty flame sensor, failed flame sensor, damaged burner, bad high limit switch

Repair guides common to all heating & cooling combined units

These step-by-step repair guides will help you safely fix what’s broken on your HVAC system.

How to replace the furnace flame sensor

The flame sensor detects when furnace burner flames are lit. You may need to replace the flame sensor if flames only stay on for a few seconds.

Repair difficulty
Time required
 15 minutes or less
How to unclog the air conditioner drain line

The condensate drain line for your central air conditioner can clog with mold and mildew. Water will back up and start dripping below the inside air conditioner unit. Follow the steps in this guide to unclog the drain pipe.

Repair difficulty
Time required
 15 minutes or less
How to replace a heating and air conditioning system thermostat

The control thermostat for your HVAC system can stop working. This repair guide shows how to replace it.

Repair difficulty
Time required
 30 minutes or less