> By: The Cooling Company > Published: 2025-12-26 > Last updated: 2025-12-26
If your heater stops working, start with a few safe checks first. Check the thermostat, power at the breaker, and the air filter. Change a dirty filter, replace thermostat batteries, and reset tripped breakers. If you smell gas or hear combustion problems, stop and call a licensed technician right away. (Source: Energy gov Heat Pump Tips)
Key Takeaways
- Do quick checks first: thermostat mode, power, filter, and vents to rule out simple causes.
- If you smell gas, a CO alarm sounds, or ignition fails, call a certified pro right away.
- Change filters every 1–3 months and schedule annual tune-ups to cut breakdown risk.
How do I quickly diagnose a heating issue?
Start by gathering clear symptoms and facts you can report. Note when the issue began, whether it is constant or intermittent, what the thermostat shows, and which rooms are affected. Short notes help you and the technician spot patterns over time.
Next, do a safe visual and basic functional check of the system. Look for power lights, loose wires, and clogged filters. Smell for gas or burning. Check vents and radiators to find exactly where heat stops. These steps narrow likely causes before deeper testing.
Is the thermostat working correctly?
Check that the thermostat shows the correct mode and temperature. Some models go blank when batteries are low. Confirm it is set to heat and that the setpoint is above room temperature. A wrong mode or a schedule hold often looks like equipment failure.
Are thermostat batteries and settings the problem?
Replace AA or AAA batteries if the display dims or resets. After changing batteries, verify any schedules and setpoints. Some programmable thermostats revert after a power loss. For Wi‑Fi units, confirm the device reconnected to your network.
Are circuit breakers tripped or fuses blown?
Locate the electrical panel and check breakers labeled for furnace or air handler. A tripped breaker often sits between On and Off. Move it fully Off, then On. If it trips again right away, stop and call a pro, since repeated trips indicate a deeper electrical problem.
Could a dirty air filter reduce heat?
A clogged filter restricts airflow and cuts heat delivery and efficiency. Replace disposable filters or clean reusable ones every 1–3 months, more often with pets or heavy dust. Reduced airflow can overheat the furnace and damage components over time. (Source: Energy gov Heat Pump Tips)
Why is one room colder than others?
Uneven heat often comes from closed vents, blocked returns, or leaky ducts. Check that supply registers are open and clear of furniture. If radiators are cool at one end, bleeding them may help. Persistent cold spots can mean duct design or insulation problems.
Is the air handler making unusual noises?
Rattles, grinding, or squeals suggest mechanical issues. Loose panels or debris can rattle. Bearings wear and motors hum or grind when failing. If you hear loud mechanical noises, turn the unit off and arrange service to avoid further damage.
Are vents closed or ducts blocked?
Inspect registers and return grilles to ensure they are open and unobstructed. Covering return vents raises static pressure and reduces airflow. If closing vents changes room comfort, a professional duct balancing and leak check may be needed to restore even heating.
What quick fixes can most homeowners try?
Many common problems have quick, low-risk fixes. Start with the thermostat, filters, breakers, and vents. Changing a filter, replacing batteries, or resetting a breaker often restores heat. Keep safety top of mind and stop if you find gas or electrical burning smells.
Keep a short homeowner checklist near the system that lists filter size, thermostat model, and breaker label. Having this info speeds simple fixes and helps the technician if you call for service. Also note any steps you tried and their outcomes.
How do I change a furnace air filter?
Turn off power to the furnace at the switch or breaker before opening the filter slot. Slide out the old filter and check its condition. Install a filter that matches the size and has an appropriate MERV rating for your system. Make sure the arrow points toward the air handler.
Can resetting the thermostat help?
A reset clears minor software glitches on many thermostats. For basic models, removing batteries for a minute may reset it. Smart thermostats typically have a menu reset. After reset, re-enter schedules and watch one full cycle to confirm normal operation.
How to reset tripped breakers safely?
Turn off devices on the circuit before resetting a breaker. Move the breaker fully to Off, then to On with a firm motion. Avoid using tools on the panel. If the breaker trips again right away, stop and call a licensed electrician or HVAC technician.
Should I bleed radiators or purge zones?
Bleeding trapped air from hydronic radiators can restore heat at the far end. Use a radiator key and a small container to catch drips. Open the valve until water flows steadily, then close it. If zones remain cold, a professional purge or pump check may be needed.
Will replacing thermostat batteries fix issues?
Replacing batteries often fixes blank displays or erratic behavior. Use fresh batteries and confirm the thermostat retained settings. If batteries drain quickly, a wiring issue or weak transformer may be present and needs professional testing.
Which issues are signs of serious faults?
Some symptoms mean danger or costly repairs. Gas smells, CO alarm activation, cracked heat exchangers, and refrigerant leaks are urgent. Repeated ignition failures, severe short cycling, and visible rusted venting need immediate professional attention. Stop the unit and call a tech when you see these signs. [Point 1] (Source: Energy gov Heat Pump Tips)
Don’t try combustion testing or refrigerant handling yourself. These tasks require special tools and certifications. A licensed technician can perform combustion analysis, check venting, and test for heat exchanger cracks. Regular checks reduce the chance of these serious faults.
What does no heat at all indicate?
No heat can range from a tripped breaker to a failed control board. For gas furnaces, ignition failure, lack of gas supply, or a blocked flue can cause no heat. For heat pumps, compressor failure or low refrigerant are possible causes. Note any fan response to help diagnostics.
Are strange smells a safety risk?
Burning plastic or electrical smells point to wiring or motor failure and need immediate attention. A rotten-egg smell means natural gas and is an emergency. Avoid using electronics or open flames and evacuate before calling emergency services and your gas company.
Could carbon monoxide be present?
Carbon monoxide is colorless and odorless. A CO alarm is the only reliable home sign. If a CO alarm sounds, evacuate everyone and call emergency services. A technician must perform a combustion safety test before anyone sleeps indoors again.
Why is the unit cycling on and off?
Short cycling means the system starts and stops too quickly. Causes include low airflow, oversized equipment, or control failures. Short cycles wear the compressor or motor. If filters and vents look fine, call a technician to test refrigerant and controls.
Is water around the equipment normal?
A small amount of condensate from high-efficiency furnaces and heat pumps is normal and should drain. Pooled water or constant leaks are a problem. Blocked condensate drains, cracked pans, or refrigerant leaks need professional repair to prevent water damage and electrical hazards.
Can loud bangs mean a dangerous fault?
A loud boom at startup often comes from delayed ignition where gas accumulates then ignites. Repeated bangs stress the heat exchanger and can lead to cracking. If you hear such sounds, stop using the system and schedule an immediate inspection.
Should I be worried about higher heating bills?
Sudden bill spikes can mean lower efficiency, leaky ducts, or failing components. Start with checks for dirty filters, thermostat settings, and air leaks in the home. If bills remain high, have a contractor run efficiency tests and inspect combustion and airflow components.
Do control panel error codes matter?
Yes. Error codes help technicians isolate failed sensors or safety lockouts. Note any codes and blinking patterns before you call. Technicians combine these codes with measurements to diagnose issues faster and reduce repair time.
What safety checks should I perform first?
Quick safety checks can prevent injury or worse damage. Smell for gas, confirm CO detectors are working, and verify the system has power and correct venting. If you detect any danger signs, turn the system off and call emergency services or your gas company.
Keep the main gas shutoff and breaker locations handy. Know where filters and the thermostat are. Being prepared makes winter nights less stressful and speeds safe responses when problems occur. [Point 2] (Source: Energy gov Heat Pump Tips)
How to check for gas leaks safely?
If you smell sulfur or rotten eggs, leave the building right away and avoid using phones or switches. From a safe distance, call your gas utility emergency number and a licensed HVAC technician. Do not re-enter until the area is declared safe by professionals.
Can I test CO detectors myself?
Yes. Press the test button to check alarm sound and battery health. Test monthly and replace batteries yearly or as needed. Replace detectors older than their manufacture life, usually five to seven years. Place alarms near sleeping areas and each floor.
Should I shut off the system in an emergency?
Shut off the system if you smell gas, see water flooding, or detect a strong burning smell. Turn the thermostat off and switch the system’s breaker to Off. If you can do so safely, also shut off gas at the meter and wait for pro clearance before restarting.
How much will common heating repairs cost?
Repair costs vary by region, the part that failed, and the labor involved. Simple fixes like filters or thermostat batteries are low cost. Replacing parts such as igniters or flame sensors runs in the mid-range. Major items like compressors or heat exchangers cost much more.
Ask for a written breakdown of parts, labor, and any diagnostic fee. Emergency or after-hours calls typically cost more. Comparing clear, written estimates helps you make a fair choice and avoid surprise charges on the final invoice.
What is a fair price for furnace repair?
Prices vary, but a typical flame sensor replacement often runs around $150–$300 including labor. An igniter replacement may be $200–$400. Local labor rates and part brands change the final cost. Always ask for parts and labor separated on the quote.
How long do typical repairs take?
Simple tasks like a filter change or battery swap take 15–30 minutes. Replacing an igniter or flame sensor often takes 30–90 minutes. Major repairs such as compressor swaps or heat exchanger replacement can take several hours and may need permits or special parts.
Which parts commonly fail?
Common failures include filters, capacitors, motors, igniters, flame sensors, and control boards. Heat pumps may have compressor or reversing valve issues. Boilers often need circulator pump or valve repairs. Failed parts usually show specific noises or error codes before full failure.
Are service calls billed separately?
Many contractors charge a diagnostic fee for travel and initial work. That fee is often credited toward repairs done the same visit. Ask about the fee when scheduling and whether phone troubleshooting can waive it in simple cases.
What warranties cover labor and parts?
Manufacturer part warranties range from one to ten years depending on the component. Labor warranties vary widely by contractor. Ask for both part and labor warranty details in writing before authorizing work. Know exclusions and any required maintenance to keep warranties valid.
How to spot a reputable contractor?
Look for NATE certification, proper state licensing, and insurance. Check local reviews and ask for references. A reputable company gives clear estimates, explains options, and provides written warranties. Watch for high-pressure sales tactics or vague paperwork. [Point 3] (Source: Energy gov Heat Pump Tips)
What questions should I ask a tech?
Ask which diagnostics they will run and whether they use original equipment parts. Request a clear price breakdown and warranty terms. Also ask about expected lifespan after repair and whether they follow ACCA Manual J for system sizing on replacements.
How to prepare your home for a service visit?
Clear access to the furnace, boiler, or air handler and move small items away. Secure pets and ensure a clear path from the door to the equipment. Have thermostat settings, recent service notes, and any error codes ready to speed the visit.
Can preventive maintenance reduce future costs?
Yes. Annual tune-ups catch wear before it fails. Typical checks include cleaning burners, testing ignition, inspecting heat exchangers, and verifying airflow. Many contractors offer maintenance plans with priority service and repair discounts, which can save money long term.
What seasonal checks matter most?
Before winter, validate combustion safety, venting, and ignition systems. Check filters and test thermostat schedules. For heat pumps, test defrost cycles and clear outdoor unit debris. These seasonal checks reduce mid-winter breakdowns and improve comfort.
Are maintenance plans worth buying?
Maintenance plans can be worth the cost if they include inspections, priority scheduling, and repair discounts. Read the fine print for exclusions and required service intervals. Compare plan cost against local tune-up prices to decide if a plan fits your needs.
Documentation, warranties, and next steps
Keep a binder or digital folder with manuals, service records, and warranty papers. Record filter changes, service visits, and parts replaced with dates. Good records speed diagnostics and help when making warranty claims or selling the home.
Store a photo of the unit nameplate with model and serial numbers. Note the install date and major repairs. This data helps contractors pick the correct parts and avoids ordering wrong components. A little prep saves time and money.
What records should I keep?
Keep invoices for repairs, tune-ups, and parts plus any permits. Record the technician’s name and license number. Note how you tried to troubleshoot and the final result. A simple spreadsheet or photo folder is enough to track this data.
Where to find manuals and serial numbers?
Look for a nameplate on the unit cabinet or inside access panels. Model and serial numbers are usually on that sticker. If you cannot find the manual, search the model number online or ask the manufacturer for a copy to speed future repairs.
Ready to get professional help?
If basic checks do not restore heat, or if you find any safety risk, call a licensed HVAC technician. For gas, combustion, and refrigerant work, always use certified pros. Prepare your notes and the unit model so the tech arrives ready and can work efficiently.
If you are in Las Vegas, Henderson, or North Las Vegas and need fast, safe heating repair or maintenance, call The Cooling Company at 17029308411. Our NATE-certified technicians perform combustion safety tests, heat exchanger inspections, and emergency repairs. We provide clear written estimates and priority service for local customers.
For readers outside our service area, find certified technicians through NATE at natex.org. That resource helps locate trained techs near you. If you are local, call The Cooling Company at 17029308411 for fast scheduling and reliable, certified service.
Related reading: what to explore next?
About The Cooling Company
- Phone: 17029308411
References
- U.S. Department of Energy (Energy.gov) (accessed 2025-12-26)
- U.S. Environmental Protection Agency (EPA) (accessed 2025-12-26)
- ASHRAE (Standards and guidance) (accessed 2025-12-26)
- ENERGY STAR (Heating & cooling) (accessed 2025-12-26)