Originated From
Definitions.net

What does a roll out switch do in a hvac unit?

Liked this question? Tell your friends about it

4 Answers

Order by
Oldest to Newest
Newest to Oldest
Votes

Roll out switches are used to control the high limit on your heater. If the heat exchanger gets too hot the roll out switch breaks the circuit going to the burner. They have a button on them so they can be manually reset. They will not reset automatically. If yours operates unexpectedly, you need to check the furnace for the problem.

Life is a one lap race. Make many pitstops.

a roll out switch is a heat limit switch, when you get a back draft or it your chimmeny is dirty, what happens is the flame comes out of the front of you boiler or furnace which causes the roll out switch to open and break the circuit, some have to be manually reset, because it's telling you there is a dangerous problem happening to your boiler or furance and you should have it check by a techincan. hope that helped

Thanks, that helps.  My unit is old and the roll-out has a adjustable temp on it set to the lowest temperature available.  Another question I have is if my heat exchanger tubes have a burned out portion on them, and flames are coming out of them, would the roll-out switch also break the circuit or would that be something else?

You better change your furnace, There's no price on your life, that if you have a cracked heat exchanger and the flame comes near the roll out switch yes. It's time for a new furnace or boiler

Related Questions

Other people asked questions on similar topics, check out the answers they received:

Asked: How Do I Put a New Paper Roll Into a Credit Card ...

How Do I Put a New Paper Roll Into a Credit Card Machine?

Asked: Switch usernames on aol software

How can I switch user names on my Mac? under the option menu there is not the username selection.

Asked: 2001s-10p/u how does the 4x4 switch come out on ...

2001s-10p/u how does the 4x4 switch come out on the zr2 p/u to change it out

More Questions

Any idea on difference between mutual fund and unit trust?

I have a DBS account so I visited DBS unit trust FAQ page and got this: - A unit trust pools money from many investors, which is then invested in a variety of assets in order to meet specified investment objectives. The pool is managed by a team of full time professionals and a trustee is appointed ...

I want to post a question to the advice column on Switched. Please tell

You can submit questions to the advice column at switched.com/contact/comments . For more Switched questions, check out this article: Switched FAQs

HVAC gauge calibration question.

I'd always suggest getting a specialist out to your house. hvac is a science, and you don't want to mess anything up. The screwing the gauge to zero works, but I'd still suggest a specialist.