How do you troubleshoot an old furnace?

Furnace Troubleshooting Recap:

Clean or replace air filter.
Troubleshoot thermostat problems — replace batteries if necessary.
Set thermostat to heat and at a higher temperature than the current room temperature.
Check electrical panel for blown fuses or tripped breakers.
Make power switch near furnace is flipped on.

How does a Rheem and Ruud gray furnace work?

The below is an overview of how the furnace works. This furnace uses an ignition control to start the burners and provide flame safety control. On a call for heat, 24 volt power travels from the thermostat through the limit switches to energize the ignition control. When power is applied to the control, the ignition sequence begins.

What was the last draft hood furnace made?

It was one of the last draft hood furnaces to be made. The burner was atmospheric (meaning the heat of combustion moved the vent gasses out of the vent). It did not have a standing pilot. Instead it used an HSI to ignite the burners. The HSI also sensed flame for the flame safety control.

What kind of heater does Rheem furnaceman use?

The video below starts the troubleshoot of this furnace through the draft hood switch. One of the most common problems with the HSI equipped furnaces is failure of the HSI. The HSI (commonly called the hot stick), is a 120volt heater that warms to 2300 degrees F to light the gas.

What does it mean when your furnace is not igniting?

The oldest way is by a pilot light and over the last 30 years or so these have been replaced by electronic ignition systems. If these fail to do their job your furnace will not come on. This is a small flame which is constantly burning inside your furnace. It’s so small it does not consume much gas.

How to tell the age of a Ruud air conditioner or furnace?

How can I tell the age of a Ruud air conditioner or furnace from the serial number? Saturday, June 23, 2018 Find the letter in the middle of the serial number. The first two numbers after it are the week of manufacture, and the third and fourth numbers after the letter are the year of manufacture.

Where do I find Ruud model and serial numbers?

Should you have a problem with your system, Ruud has developed the following guidelines to assure that your problem receives proper attention. To better assist your independent HVAC contractor, please furnish the model and serial numbers on each piece of your equipment and the date of installation.

Is it possible to tell how old your furnace is?

Whether you’ve recently moved into a new home with an existing furnace or are simply unsure about the system in your current home, it can be a difficult process trying to determine exactly how old your furnace is.

Where can I find the serial number on my furnace?

Depending on the specific manufacturer as well as the year of production, the serial number might be found in a number of different locations. Typically, you’ll be looking for either a paper or metal tag, sticker, or imprint.