Why is my camper furnace blowing cold air?

Asked By: Myrtis Aonghuis | Last Updated: 3rd June, 2020
Category: home and garden indoor environmental quality
4.5/5 (2,290 Views . 39 Votes)
“One common reason for the furnace blowing cold air is low battery voltage. Unlike a residential furnace, in which the blower doesn't start until the plenum has warmed up, an RV furnace starts blowing immediately. The blower motor spins, but not fast enough to deflect the sail switch.

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In this regard, why is cold air blowing when the heat is on?

Your furnace may be blowing cold air because the filter is too dirty. A dirty air filter blocks airflow over the furnace's heat exchanger, causing it to overheat. When overheating, your furnace can trip a high limit switch, causing the furnace burners to shut off so that the heat exchanger does not crack.

Also, how do I turn on the furnace in my travel trailer? The main shutoff valve is usually located at the Propane Tanks. To turn on your RV Furnace, you will use your RV's Thermostat. Make sure that the thermostat is set to heat and adjust it to the desired temperature and the furnace or furnaces should automatically kick on and off to maintain the proper temperature.

In this regard, why is my furnace running but no heat?

Dirty filters are the most common cause of furnace problems. Dust and dirt restrict airflow—and if the filter gets too clogged, the heat exchanger will overheat and shut off too quickly, and your house won't warm up. If the blower is running but no heat is coming out, replace the filter.

What do I do if my heater is blowing cold air?

When your furnace blows cold air, try turning the heating unit off and on. If the air feels warm for a moment or two, then switches to cold, it may be that the flame sensor is dirty. With a dirty flame sensor, your gas burner won't stay lit, causing the air to go cold soon after the furnace turns on.

35 Related Question Answers Found

Why does my heat feel like cold air?

If it's a particularly cold day or night, your heat pump might just be blowing air that's cooler than your body temperature, making you think it's cold. But as it gets colder, and your heat pump can't pull as much heat in from the outdoor air, the air coming from your vents drops slightly in temperature.

How do I reset my heater?

Turn the power back on and then the main gas supply. Locate the reset button. It is labeled, sometimes in red. Press and hold the reset button for 30 seconds.

Why is there no cold air coming out of my vents?

Make sure the fan setting is set to “auto” not “on”, which will cause your AC to blow air even if it's not being cooled. 2) Check your air filter— If the air coming out of the supply vents is weak and not very cool, check to see if the air filter is dirty and change it if necessary.

Why is my AC running but not cooling?

The most common cause of window air conditioners not blowing cold air is a lack of adequate air flow. If the air filter is dirty or clogged, there may be little or no air flow over the evaporator coils, which may cause them to become too cold and frost or ice can form on them, restricting the air flow even more.

Why is my heat not blowing hot air?

Furnace overheating can be the cause of your cold air dilemma. Changing the dirty air filter can solve this problem. The dirty air filter blocks the airflow, causing the furnace to run longer to heat your home until it overheats. It is important to note that constant overheating can damage your heat exchanger.

How do I reset my thermostat?

Here are the steps you need to take to reset your AC thermostat.
  1. Shut Down Your AC at the Thermostat. The first step in resetting your AC thermostat is to turn it off at the AC unit.
  2. Find Your Circuit Breaker Box.
  3. Reset the Circuit Breaker for Your AC Unit.
  4. Wait 30 Seconds.
  5. Turn the AC Thermostat Back On.

Where is the reset button on a furnace?

The reset button is typically located inside the blower compartment on the side of the blower motor. When should I press the reset button? First, you need to locate your circuit breaker and switch off the power supply to the furnace. Then, if you see that the button is up, push it to reset your furnace.

How do you troubleshoot a thermostat?

Programmable Thermostat Troubleshooting Try These Tips First
  1. Batteries – Many programmable thermostats operate on batteries. Remove the cover to the thermostat and replace the batteries if applicable.
  2. Circuit panel – Check the circuit panel for a tripped breaker.
  3. Fuse – Many thermostats contain a fuse inside.
  4. Wire contacts – It's possible a wire contact has come loose.

Can a furnace run without a filter?

If you run a furnace without a filter for one night, it won't affect your HVAC system detrimentally. However, the longer you run your heating system without an air filter, the more contaminants accumulate inside your heating unit inner mechanisms.

How long does a furnace last?

Average Furnace Lifespan
While some furnaces can last over 40 years (extremely rare), the average lifespan of a typical gas furnace is around 15-30 years. As long as you have scheduled yearly furnace maintenance, your furnace should easily last over 15 years.

What does it mean when your heater won't turn off?

If your furnace keeps blowing hot air and won't stop, the furnace burners aren't turning off. Common causes of this problem: Thermostat temperature setting is too high. The furnace will run constantly to keep up on a cold night.

Does my RV furnace have a filter?

Most RV furnaces don't have filters on the cold air return. We cut a piece of furnace filter to fit the grill in front of our furnace. The return is in front of the furnace. Ours is under the refrigerator, but yours will be wherever the furnaces are located.

Do RV heaters run on electricity?

While onboard RV furnaces do not run solely on electricity, the heater that's built into your RV's HVAC system does — and there are a variety of electric heaters on the market you can add to your RV's interior for extra heating.

Will my RV furnace work without a battery?

Most things inside your RV will not work without a properly functioning 12-volt DC house battery system. That is where your RV's power converter is used. When plugged into shore power, this device is converting 120-volt AC power into 12-volt DC power.

Can I run my RV furnace on 110?

Can you run the furnace on 110? Yes but it also uses propane. You'll need your converter on or good l/fully charged batteries. Assuming you Moho is like a trailer.

Why Is My RV furnace smoking?

1) Soot is the result of incomplete combustion, meaning that your furnace isn't burning the gas properly or efficiently. 2) Soot can be deposited on the heat exchanger, acting as an insulating barrier. This insulation barrier lowers your furnace's efficiency, increasing your energy bills as a result.

Can I run my RV furnace on battery?

Yes, the furnace will run on batteries. Heat is actually produced from propane, but the blower fan runs on battery. The typical furnace will draw about 8 amps of power. The 12 volt battery system in your RV runs many of your electronics on your Camper, RV, or Travel Trailer.