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Rheem Furnace Not Heating
Common reasons for your Rheem furnace not heating
The most common reasons for your Rheem furnace not heating are a thermostat issue, ignition failure or power supply problem.
34% of the time it's the Thermostat Issues
28% of the time it's the Ignition System Failure
23% of the time it's the Power Supply Problem
15% of the time it's the Something else
Schedule your Rheem furnace repair now!
We can help! Our certified technicians repair all models of Rheem furnaces. We can fix yours no matter where you bought it.
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Rheem Furnace Not Heating – Troubleshooting and Repair
When your Rheem furnace won’t heat, it’s often caused by one of three common problems: thermostat issues, ignition problems, or lack of power. Before setting up a repair visit, try these quick steps.
1. Verify Thermostat Settings
- Set the thermostat to HEAT mode and raise the temperature setting several degrees above room temperature.
- If your thermostat uses batteries, replace them.
- If the display is blank or unresponsive, that’s likely the reason your furnace won’t start. Shut off the house circuit breakers for your furnace and check the thermostat wiring connections. If the wiring connections are okay, schedule service.
2. Check the Igniter or Pilot Light
- Older Rheem furnaces use a standing pilot light—make sure it’s burning. Follow manufacturer instructions to relight it safely if it’s out.
- Newer models use electronic ignition. If the furnace clicks but never ignites, the igniter or flame sensor may need service.
If your furnace still isn’t blowing hot air after these checks, it’s time for a professional repair.
3. Check Furnace Power
A furnace without power can’t start the blower or heat your home.
- Make sure the furnace power switch (near the unit) is turned ON.
- Check your home’s circuit breaker panel and reset any tripped breaker.
- If your system uses a fuse instead of a breaker, replace a blown fuse.
Schedule Trusted Rheem Furnace Repair
Sears Home Services repairs all Rheem furnace models.
Our nationwide service network provides furnace repair in every major metro area across the country including:
- Los Angeles
- San Diego
- New York
- Dallas
- Houston
- Atlanta and more
Our licensed technicians can quickly diagnose the problem—whether it’s a bad igniter, faulty control board, dirty flame sensor, or gas valve issue—and get your system heating again fast.
- Expert furnace repair technicians
- Same-day and next-day appointments available
- All repairs backed by the Sears satisfaction guarantee
Call 1-800-469-4663 or schedule your furnace repair online today to get your heat restored quickly.
Rheem Gas Furnace repair is quick and easy
EASY SCHEDULING
Book online in less than a minute.
DIAGNOSTIC FEE
Apply your diagnostic fee to the costs of repair.
PROTECTION PLANS
Save up to $150 on your repair if you enroll in a home warranty.
Frequently Asked Questions
Why is my Rheem furnace not heating?
The most common reasons are incorrect thermostat settings, ignition or pilot light failure, or a loss of power to the furnace. If these basic checks don’t fix the issue, a professional repair is recommended.
How do I troubleshoot my Rheem furnace before calling for service?
Set the thermostat to HEAT, raise the temperature, replace thermostat batteries, confirm the furnace power switch is on, and check your breaker or fuse. If the furnace still won’t ignite or blow warm air, schedule service.
Should I relight the pilot light on my Rheem furnace myself?
If you have an older standing pilot model, you can follow the manufacturer’s relighting instructions carefully. If the pilot won’t stay lit or you’re unsure, it’s safer to have a trained technician handle it.
Does Sears repair all Rheem furnace models?
Yes. Sears Home Services repairs all Rheem furnace models and can address issues like bad igniters, dirty flame sensors, faulty control boards, and gas valve problems, with same-day or next-day appointments in many areas.
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