(702) 213-4565Desert winters catch Henderson homeowners off guard. Daytime highs in the 60s can drop to the 30s after sunset, and that overnight cold snap is exactly when a heating system that sat unused all summer decides to quit. If your furnace or heat pump has suddenly stopped keeping up, most winter heating problems come down to six causes: a thermostat issue, a pilot light or ignition fault, a failing blower motor, short cycling, a carbon monoxide risk, or a frozen condensate line. Below is how to spot each one, what you can safely check yourself, and when to call a licensed technician.
At Sunrise Service, we’ve kept Las Vegas Valley homes warm since 1993. Here’s how to get ahead of a heating failure before you’re left shivering.
Common Winter Heating Problems (and How To Fix Them)
February is one of the toughest stretches of the year for a home’s heating system. The most common issues Henderson homeowners run into are thermostat malfunctions, pilot light and ignition problems, blower motor failures, short cycling, carbon monoxide hazards, and frozen condensate pipes. Start with the direct answers below, then read the section that matches your symptom.
Why is my thermostat not turning on the heat?
A thermostat that won’t call for heat is usually a power or settings problem, not a broken furnace. Start with the basics: replace the thermostat batteries, confirm it’s set to “Heat” and a few degrees above room temperature, and check that no breaker has tripped in your electrical panel.
If it still won’t respond, gently clean dust from the thermostat’s internal components. When basic fixes don’t work, upgrading to a smart thermostat can give you more reliable temperature control and remote monitoring.
What should I do if my furnace pilot light or ignition won’t stay lit?
Check the flame color, but don’t try to relight it yourself. A healthy pilot light burns steady blue. A yellow, orange, or flickering flame points to a combustion or gas-supply problem that needs a professional.
Many newer furnaces use electronic ignition rather than a standing pilot, so a repeated failure to ignite often means a faulty igniter or flame sensor. If you see anything other than a steady blue flame — or smell gas — shut the system off and call a licensed technician right away.
Why is my furnace making a grinding or squealing noise?
Grinding, squealing, or rattling almost always means a blower motor problem. First, replace a dirty air filter — restricted airflow makes the motor work harder and is the cheapest thing to rule out.
If the noise continues after a fresh filter, the motor belt, capacitor, or bearings may be worn and need replacement. Running a blower with a failing motor can burn it out entirely, so it’s worth having it checked before the part fails completely.
Why does my heater keep turning on and off? (Short cycling)
Short cycling — when your heater switches on and off in rapid bursts — usually points to restricted airflow or a thermostat placement issue. Replace clogged air filters and clear any furniture, rugs, or boxes blocking your vents and returns.
Also make sure the thermostat isn’t mounted near a heat source like a lamp, vent, or sunny window, which can trick it into cycling. If the problem persists, the system may be oversized for your home or have a deeper mechanical fault, and a technician can confirm whether a correctly sized, high-efficiency unit is the better long-term fix.
How do I know if my furnace is leaking carbon monoxide?
Carbon monoxide is odorless and colorless, so a working CO detector is your only reliable warning. Test your carbon monoxide detectors regularly, keep furnace vents and flues clear, and watch for warning signs like a yellow pilot flame or soot around the unit.
If a CO detector goes off, leave the house immediately and call 911 from outside. Do not re-enter until emergency responders say it’s safe. This is the one heating problem where there is no DIY step — safety comes first, every time.
How do I thaw a frozen condensate line?
Thaw a frozen condensate line gently with warm — never boiling — water or a towel soaked in warm water. High-efficiency furnaces and heat pumps produce condensation that drains through a small pipe, and on a cold Henderson night that line can freeze and back the system up.
Boiling water can crack the pipe and cause bigger damage, so keep it warm, not hot. Once the ice clears, it’s worth having a professional find out why it froze — poor insulation or a drainage slope issue — so it doesn’t happen again and drag down your system’s efficiency.
Why Henderson Homes See Heating Problems in Winter
It’s easy to assume the desert doesn’t get cold, but the Las Vegas Valley sits in a high-desert climate where temperatures swing hard between day and night. Henderson winters regularly dip into the 30s and 40s overnight from December through February, and homes here run their heat far less than homes in colder regions — which means small problems go unnoticed until the first real cold snap.
That low usage is exactly why so many failures show up in winter. A furnace or heat pump that sat idle through a 110-degree summer hasn’t been stress-tested in months, and dust, worn igniters, and weak capacitors only reveal themselves once the system is asked to run for hours at a stretch. Scheduling maintenance in the fall — before you need the heat — is the single best way to avoid a cold-night breakdown.
Sunrise Service: Your Henderson Home Heating Partner
We understand the stress of an unexpected heating failure on the coldest night of the year. Our NATE-certified technicians are dedicated to restoring comfort to your home quickly and safely, with honest recommendations and up-front pricing.
We provide comprehensive heating system diagnostics and repairs to keep your home warm and safe all winter long. Not sure whether to fix or upgrade? Our guide on whether to repair or replace your heater can help you decide.
Don’t let an unexpected heating problem freeze you out. Call Sunrise Service today at (702) 568-5300 to address your heating concerns this winter in Henderson, NV. We offer 24/7 emergency service across the Las Vegas Valley.
And when the desert heat returns, our AC repair services are available year-round to keep your whole HVAC system running smoothly.
Frequently Asked Questions About Winter Heating Problems
Why did my heater stop working all of a sudden?
A sudden heating failure is most often caused by a tripped breaker, dead thermostat batteries, a clogged air filter, or a failed igniter or flame sensor. Start by checking the thermostat settings and your electrical panel. If power and settings are fine and the system still won’t run, it’s time to call a technician.
Is it safe to relight my own furnace pilot light?
It’s generally not recommended. Many modern furnaces use electronic ignition instead of a standing pilot, and attempting to relight one can be dangerous if there’s a gas-supply issue. If your flame is anything but steady blue, or you smell gas, shut the system off and call a licensed professional.
Why does my furnace keep turning on and off?
Rapid on-off cycling, called short cycling, is usually caused by a dirty air filter, blocked vents, or a thermostat placed too close to a heat source. It can also mean the unit is oversized for your home. Replace the filter and clear the vents first; if it continues, have a technician diagnose the cause.
Can cold weather in Henderson really damage my heating system?
Yes. Overnight temperatures in the 30s can freeze the condensate line on a high-efficiency furnace or heat pump, backing the system up and shutting it down. Cold snaps also expose worn parts on a system that ran little over the mild months. Fall maintenance is the best prevention.
What should I do if my carbon monoxide detector goes off?
Leave your home immediately, get everyone outside, and call 911 from a safe distance. Do not go back inside until emergency responders confirm it’s safe. Then have a qualified HVAC technician inspect your furnace before using it again.
How often should I have my heater serviced in Henderson?
At least once a year, ideally in the fall before winter arrives. Because Las Vegas Valley homes run their heat for only a few months, an annual tune-up catches worn parts and dirty components before the first cold night puts the system under real load.