Skip to content

RV Electric Heater Blowing Cold Air

Having an RV heater is essential for comfortable travel during colder seasons.

However, it can be frustrating when your RV electric heater starts blowing cold air instead of keeping you warm.

In this comprehensive guide, we will delve into the possible reasons behind this issue and provide step-by-step solutions to help you fix the problem and stay cozy on your adventures.

RV Electric Heater Blowing Cold Air: Understanding the Issue

Before we dive into troubleshooting, let’s understand why your RV electric heater might be blowing cold air.

Several factors could be contributing to this problem, and we’ll explore them one by one to help you identify the root cause.

Common Causes of RV Electric Heater Blowing Cold Air

  • Thermostat Malfunction: A faulty thermostat may not accurately detect the temperature, causing the heater to not turn on or off at the right times.
  • Improper Temperature Setting: Sometimes, the heater may blow cold air if the thermostat is set too low, preventing the heating element from activating.
  • Ignition Problems: If your heater uses a pilot light or electronic ignition system, any malfunction in these components can lead to cold air being blown instead of warm.
  • Air Leaks: Poorly sealed windows, doors, or vents can allow cold air to enter your RV, making it feel like the heater isn’t working correctly.
  • Clogged Air Filter: A dirty air filter can obstruct airflow, reducing the heater’s efficiency and causing it to blow cold air.
  • Low Propane Levels: In propane-powered heaters, low fuel levels can lead to inadequate heating and the emission of cold air.
  • Electric Power Issues: Insufficient power supply or faulty wiring can prevent the heater from generating warm air.
  • Blocked Heat Ducts: Any obstruction in the heating ducts can disrupt the proper flow of warm air, resulting in cold air being blown instead.

Troubleshooting Your RV Electric Heater

In this section, we’ll provide step-by-step troubleshooting tips to help you identify and resolve the issue of your RV electric heater blowing cold air.

Check the Thermostat Settings

Start by ensuring that the thermostat is set to the desired temperature and in the correct mode (heating).

If it’s battery-operated, replace the batteries.

Inspect the Ignition System

If your heater uses an ignition system, check for any visible signs of damage or malfunction.

Clean the ignition components and ensure they are properly connected.

Seal Any Air Leaks

Inspect your RV for any gaps or cracks that may allow cold air to seep in.

Use weatherstripping or sealant to seal these areas effectively.

Clean or Replace the Air Filter

Remove the air filter and clean it thoroughly.

If it’s damaged or too dirty, replace it with a new one.

Check Propane Levels

If your heater operates on propane, verify the fuel levels in the tank.

Refill it if necessary to ensure adequate heating.

Verify the Power Supply

If your heater is electric, ensure that it’s receiving the correct voltage and that the wiring is in good condition.

Clear Duct Obstructions

Inspect the heating ducts for any blockages or debris.

Clear them to restore proper airflow.

Keep your RV warm and comfortable

Schedule Regular Maintenance

To prevent future issues, have your RV heater serviced regularly.

A professional technician can clean, inspect, and address any emerging problems.

Invest in a Programmable Thermostat

Consider upgrading to a programmable thermostat that allows you to set desired temperatures and schedules.

This ensures optimal comfort and energy efficiency.

Improve Insulation

Enhance your RV’s insulation by adding weatherstripping, insulation panels, or thermal curtains to keep cold air out and warm air in.

Use Space Heaters as Backup

During extremely cold conditions, supplement your RV’s built-in heater with portable space heaters for extra warmth.

Stay Prepared for Emergencies

Carry extra blankets, warm clothing, and sleeping bags to stay comfortable in case your heater encounters issues during your travels.

Frequently Asked Questions (FAQs)

Why is my RV electric heater blowing cold air even when the thermostat is set correctly?

The issue may be due to a malfunctioning thermostat or a problem with the heater’s ignition system. Check and replace these components if necessary.

Can a clogged air filter cause the heater to blow cold air?

Yes, a dirty or clogged air filter can restrict airflow, reducing the heater’s efficiency and causing it to blow cold air. Clean or replace the filter regularly.

How often should I have my RV heater serviced?

It’s advisable to have your RV heater serviced at least once a year to ensure optimal performance and identify any potential issues.

Are there any safety precautions I should take while troubleshooting the heater?

Before attempting any troubleshooting, turn off the heater and disconnect the power source to prevent accidents. If unsure, seek professional assistance.

Should I keep my RV heater on continuously during cold weather?

While you can keep the heater on, consider using a programmable thermostat to set a comfortable temperature and save energy during periods of inactivity.

Can I use a portable electric heater as the main heating source in my RV?

It’s not recommended to rely solely on portable heaters for primary heating. They are better suited as backup heaters during extremely cold conditions.


A properly functioning RV electric heater is vital for a cozy and enjoyable travel experience during colder seasons.

By understanding the possible causes of your RV electric heater blowing cold air and following the troubleshooting tips and solutions provided in this guide, you can ensure a warm and comfortable journey in your RV.

Remember, regular maintenance and preparedness for emergencies are key to keeping your RV’s heating system in top shape.

Stay warm, safe, and happy on your adventures!