Není normální slyšet, jak vaše pec neustále běží, i když máte v chladnějších měsících zapnuté topení. Běží vaše pec, ale necítíte žádné teplo? V obou případech můžete použít nesprávné nastavení nebo se dívat na zkratovaný vodič:
Špatné nastavení:
- Váš termostat má nesprávné nastavení ventilátoru.
- Váš koncový spínač ventilátoru je v poloze „ruční ovládání“.
Zkratovaný kabel:
- Zkrat vodiče termostatu.
- Zkratoval se vodič u koncového spínače ventilátoru.
Odstraňování těchto možných problémů může být frustrující. Naši technici v Patrick Riley Cooling, Heating, & Plumbing obsluhují větší oblast Phoenix a provedou vás každým diagnostickým krokem, abyste mohli přesně určit, proč vaše pec stále běží. Dáme vám také vědět, kdy bude k vyřešení problému potřeba odborník.
Žijete v oblasti Phoenix a potřebujete techniku? Stačí nás kontaktovat a my vám obratem pošleme profesionála.
Zkontrolujte nastavení termostatu
Běží ventilátor vaší pece s vypnutým termostatem? Nejprve se ujistěte, že váš termostat je správně nastaven. Postupujte podle těchto kroků pro odstraňování problémů:
- Nastavte termostat na nižší teplotu, než je aktuální pokojová teplota. Nastavením termostatu na nižší teplotu se pec vypne, protože prostor již má požadovanou teplotu. Pokud byla pec uprostřed cyklu ohřevu, počkejte 3–4 minuty, než se zastaví.
Přestala vám fungovat pec? Pokud ano, je možné, že obvykle nastavujete příliš vysokou teplotu. Nastavení termostatu na teplotu, kterou má vaše pec potíže dosáhnout, může způsobit, že se bude neustále zahřívat, když se snaží této teploty dosáhnout.
Jste frustrovaní, protože prostě chcete být příjemně v teple? Váš termostat může mít potíže s dosažením vaší ideální teploty, protože dům musí být řádně vyvětrán, aby se do domu nedostal studený vzduch, protože horký vzduch uniká.
Zkontrolujte nastavení koncového spínače ventilátoru
Co je to proboha za koncový spínač ventilátoru? Vaše pec má koncový spínač ventilátoru umístěný přímo pod kapotou. Koncový spínač ventilátoru ovládá zapnutí a vypnutí ventilátoru pece. Sonda uvnitř spínače monitoruje teplotu sestavy hořáku. Sestava hořáku vytváří teplo a ventilátor pece teplo distribuuje. Když termostat signalizuje, že je potřeba teplo, zapne se koncový spínač ventilátoru, když se hořáky zahřejí, čímž se ohřeje váš prostor. Když termostat signalizuje, že není potřeba žádné teplo, koncový spínač ventilátoru se vypne, když se hořáky ochladí.
Pokud váš ventilátor HVAC stále běží, ale nedochází k žádnému ohřevu, může být váš koncový spínač ventilátoru nastaven na ruční ovládání. Postupujte podle těchto kroků pro odstraňování problémů:
- Najděte koncový spínač ventilátoru a zkontrolujte, zda je stlačený bílý knoflík (viz obrázek níže). Pokud ano, váš přepínač je nastaven na ruční ovládání nebo režim „vždy běží“.
- Vytáhněte bílé tlačítko pro resetování koncového spínače ventilátoru na AUTO. Automatické nastavení způsobí, že se ventilátor pece automaticky zapne, když se pec zahřívá, a vypne se, když je dosaženo preferované teploty.
Nastavení jsou správná, ale moje pec stále běží
Pokud jsou váš termostat a koncový spínač ventilátoru nastaveny na AUTO, ale vaše pec stále běží, pravděpodobně máte zkratovaný vodič v termostatu nebo koncovém spínači ventilátoru. Bohužel budete potřebovat odborníka na opravu zkratovaných vodičů.
Kdy potřebuji pomoc od technika Patricka Rileyho?
Pokud vaše pec stále běží s vypnutým termostatem nebo nedosahuje požadované teploty, odborník může zkontrolovat váš systém a domácnost a poskytnout možná řešení.
Pokud zkontrolujete všechna nastavení, ale vaše pec stále běží, odborník může posoudit, zda je nutné přepojit nebo vyměnit váš termostat nebo koncový spínač ventilátoru.
Kontaktujte nás ohledně oprav pece ve větší metropolitní oblasti Phoenixu a my vám pošleme zkušeného technika Patricka Rileyho, který dokáže zastavit nepřetržitý provoz vaší pece!
Související čtení:
- Top 3 problémy pece ve Phoenixu, AZ
- Pec se nezapne? AZ Tech vysvětluje
Proč si vybrat topenářské techniky Patrick Riley?
Servisní technici Patrick Riley Heating jsou hrdí na to, že jsou přesní a profesionální. Než doporučíme výměnu, věnujeme čas posouzení problému a naučíme vás, jak problém odstranit. Cena bude projednána předem a doporučení budou vhodná pro váš domov. Zprůhledníme pro vás topenářské služby a máme k dispozici možnosti financování, takže není třeba uhánět v nakupování. Pokud by ventilátor vaší pece neměl běžet nepřetržitě, neměli byste ani vy.
Původně zveřejněno: 1. března 2022
Have you ever walked into your house on a cold winter day, and your furnace won’t turn on? It is the worst feeling in the world. It’s freezing outside, you are unsure of what to do, and you are stuck thinking about what could have possibly gone wrong!
Well, don’t worry — help is available. There are several possible causes of your furnace malfunctioning. So, let’s dive into why your furnace will not turn on, and more importantly, how to avoid this chilling scenario.
Only an HVAC Pro can accurately diagnose your unique furnace issue. Get your furnace up and running ASAP with a professional furnace repair .
Buďte v teple, přátelé!
Restore Your Comfort ASAP With An HVAC Pro
How Your Furnace Works
First, let’s talk about your HVAC system’s heating cycle. Understanding how your furnace works is invaluable if you want to know what is preventing it from delivering heat.
Once the indoor temperature drops below the thermostat’s set temperature, the thermostat signals the control board inside the furnace to begin the heating process. The combustion process starts as the gas valve opens and the ignition turns on. The fire ignited inside the furnace warms the room temperature air, then the warmed air is redistributed in your home through your air ducts. Finally, the flue gasses from combustion travel through the heat exchanger and exit your home through the flue pipe.
If you have a malfunctioning heating system, it could be due to many causes, and our HVAC experts have seen it all before! Now, let’s get into the top reasons that cause a furnace to not start up.
Why Your Furnace Won’t Turn On ?
Furnace Won’t Turn On Because The Furnace Switch Is OFF
If you have a heating system that will not start, you should check the furnace power switch. The furnace switch is the unit’s power source and typically located next to the furnace or on its side. It closely resembles a light switch. First, confirm the switch is in the «on» position, and if it is, see if your furnace starts up. If the switch is flipped down in the «Off» position, then your furnace will not turn on.
If your heating system still does not start up, it might be due to a blown furnace fuse or tripped circuit breaker.
Tripped Circuit Breaker Explains Why Furnace Won’t Turn On
Furnace tripped circuit breaker
Without electricity, your furnace is entirely unable to turn on. If the circuit breaker controlling your furnace trips, it will need to be reset. Check your breaker box to see if you have a tripped HVAC circuit breaker. If you have a tripped circuit breaker, flip the tab to restore power to your furnace.
Gas Valve Is OFF
Verify that the gas valve shutoff on the furnace’s gas line is turned on. Its handle will be parallel with the gas line if it’s on. However, if it’s perpendicular, the gas is off. If the gas is turned off, rotate the gas valve handle parallel with the gas line and see if the furnace starts working.
Also, keep in mind that we are talking about a pec gas valve, which is not the same as the gas valve for a fireplace. To learn more about the function of a fireplace gas valve, check out our blog on gas fireplace repair issues.
Špatný termostat
Don’t forget that your thermostat is critical in maintaining the exact temperature you want. If something goes wrong with this device, things can get really chilly! You’ll also need batteries for when they eventually die out. So make sure to check now and then, or risk being home all winter without heat!
Damaged or Loose Thermostat Wiring
Špinavá kabeláž termostatu
When any thermostat wires are loose or broken, your thermostat is unable to communicate with your furnace. Therefore, if the connection inside your thermostat is disrupted, then chances are your furnace will not work. You can unscrew your thermostat and check that the thermostat wires are securely attached and have no visible damage.
Nesprávné nastavení termostatu
When your HVAC malfunctions, we recommend checking your thermostat’s settings. First, check to make sure it’s set to heat. Your heating system will not operate if your thermostat is set to «Cool.» Therefore, check to ensure that your thermostat is set to «Heat» and not «Cool.» Another possibility is that the thermostat has been set to «fan only.» Make sure your fan thermostat setting is on «Auto.»
If your heating system cannot sense that the room has reached the desired temperature, it will not turn on. Check your thermostat to make sure that it’s not set too low. You may also want to consider upgrading to a programmable thermostat so that you can have more control over your home comfort.
Bad Capacitor Is A Reason Why Your Furnace Won’t Turn On
A furnace with a bad capacitor will not operate. The capacitor is an electrical component that helps start and run your furnace motor. If this part fails, your furnace will likely not turn on at all. A furnace technician can test your capacitor to see if it needs to be replaced.
Furnace Won’t Turn On Due To Faulty or Filthy Blower Motor
If your heating system is not turning on, there may be a faulty or dirty blower motor. Without a functioning blower motor, your furnace will be useless. The blower motor pulls the air from inside your home, moves the air through your furnace, and back into your duct system to heat your home. Your furnace will not operate if there is poor or no airflow; therefore, it will shut down.
Additionally, If your blower motor is dirty, it will struggle to push the amount of air over the heat exchanger necessary for optimal performance. Without proper airflow from the blower, the heat exchanger will overheat from not being exposed to enough moving air. When your furnace overheats, it will shut down. Insufficient airflow from a broken or dirty blower motor will disable your furnace.
Dirty Air Filter Is Why Your Furnace Won’t Turn On
When airflow circulation is blocked, you prevent your HVAC system from functioning correctly. Without proper airflow, your furnace struggles to keep up with the household demands and is at risk of overheating. It can be easy to forget about your air filters, but if they are clogged with debris and filth, your HVAC system won’t be able to breathe! It’s recommended that the average household without a pet change their filter every 90 days. When was the last time you changed yours?
If you’re unsure how to replace your filter, our experts are more than happy to show you how! And even better, we have a step-by-step guide on how to change your air filters !
Flame Sensor Is Triggered
If your furnace does not turn on, you may have a dirty flame sensor. The flame sensor is a safety device that confirms whether a flame is present to allow the gas valve to open. Over time, this metal rod — known as the flame sensor — gets coated in carbon deposits, dust, and other contaminating materials. When the sensor becomes dirty from combustion soot, it stops sensing the flame correctly. Because the flame sensor is so dirty, the safety device malfunctions and does not allow the ignition process to begin. The flame sensor won’t «sense» the flame, so your furnace may shut down for safety, even though everything else is working correctly.
Set OFF Door Switch
The furnace door switch is a safety feature that prevents a furnace from operating if the front panel door is unhinged or ajar. So if the front panel on your furnace is not on securely, or your door safety switch needs to be replaced, your furnace won’t turn on. You should check the cabinet carefully, looking for screws, loose panels, or other indicators of tampering.
Bezpečnost Plovák Switch Shuts Furnace Down
HVAC systems often have a condensation drain pan underneath them, collecting excess water. In this case, a Safety Float Switch shuts down the HVAC system when water reaches a certain level in the pan. This is to help prevent water damage in your home. While draining the pan may temporarily solve the problem, you’re likely dealing with a clogged condensate line or drain. A heating expert can help you diagnose the problem and address it properly.
Float Safety Switch on a Furnace
High Limit Switch Is Set OFF
One potential reason your heating system may not turn on is a tripped high limit switch. The purpose of the high limit switch is to communicate the temperature inside the furnace to the thermostat to turn on the furnace blower motor at the proper time. This feature is essential because the high limit switch turns the furnace off if the furnace is overheating. Consequently, if your high limit switch is dirty, damaged, or needs to be replaced, your furnace won’t turn on.
HVAC Pro kontroluje spínač horního limitu
Triggered Pressure Switch
If the pressure switch is set off or malfunctioning, your heating system will not run.
A pressure switch is a safety feature that will shut down your HVAC system if it senses that the flue gases are not appropriately exhausted. This safety device is triggered when it detects negative static pressure in the flue pipe or the draft inducer motor inside your furnace. This prevents dangerous exhaust back drafting, which could make you sick or even kill you! The automatic shutdown also guards against gas leaks and protects our homes by not allowing air circulation when there’s a mechanical failure in the furnace. This ensures no unwanted gases are pushed into our house from the furnace.
Also, consider that if your pressure switch is dirty, worn, or damaged, the safety device will wrongly trigger your furnace off.
Alerted Flame Roll Out Switch
As your burner is ignited, its flames will fill the combustion chamber in your furnace. Certain conditions — such as cracked heat exchanger , a dirty combustion chamber, or a blockage in the flue pipe — may cause these flames to «roll out» of the combustion chamber. This poses a severe fire hazard and the potential to damage internal equipment. For your protection, every furnace has a flame roll-out switch meant to shut off your heating system if it senses that there are flames rolling out of the combustion chamber. If your furnace does not turn on, you could be dealing with an overheating furnace or a faulty safety flame roll-out switch.
Restore Your Heat With An HVAC Pro
How To Avoid No Heat This Season
The HVAC system is one of the most critical systems in your home, so it’s worth investing some time and attention into keeping it running smoothly. However, it also pays to get ahead of your furnace problems before having no heat! Consistent maintenance is the best way to prevent issues with your heating system this season. If you have a heat pump system, it can also limit how often the auxiliary heat runs; explore more about your system’s auxiliary heat function in our blog about it ! The last thing anyone wants during a cold winter when they come inside from work is an unresponsive heater that won’t turn on. This can happen if you have a frozen heat pump . Regular maintenance and inspections will help prevent this issue before it becomes too difficult for your HVAC Pro to fix with just one visit!
During a furnace tune-up, a certificated HVAC pro inspects the condition of every part of your furnace, makes adjustments where necessary, and cleans each of its components. That means that you won’t have to worry about a dirty blower motor or clogged furnace filter shutting down your heat. As part of a furnace maintenance visit, an expert will test all safety features and check the thermostat for proper operation. Not only does maintenance prevent your furnace from breaking down, but it also offers peace of mind that everything is working how it ought to. Learn more about the steps involved in properly maintaining your furnace in our blog about how to do a furnace tune up !
Furthermore, if you want a guide to more general furnace repair issues, check out our blog on common furnace repair problems .
So Your Furnace Won’t Turn On?
We know all too well that a furnace can be a lifesaver during the winter months. So what do you do when your system goes down and you don’t have any heat? Simple: you call Baltimore’s best heating repair contractor for assistance! Just give us a call at (443) 219-7798 or schedule online here . There are many reasons why your furnace may turn on. The best way to find out is to contact an HVAC Pro for a furnace repair consultation. They will listen to the issue you’re having, inspect your heating system and provide recommendations for what needs to happen next.
Also, if you have any other questions about furnaces or need help with anything else related to home comfort systems in general, please do not hesitate to ask us! We would love nothing more than to help our customers feel comfortable in their homes. An if your AC does not turn on when it gets warm, you can learn about the issues your system may have by checking out our AC repair blog !
