Forced Air Rumbling

Old 01-15-02, 10:34 AM
Visiting Guest
Posts: n/a
Forced Air Rumbling

I just bought a house that has propane heated forced air. I have a couple of questions. Is it supposed to kick in every few minutes even when the thermostat has reached the required temperature. The temperature however never goes past the desired level. (Does it do this to maintain heat level?)

The other question that i have is every so often when the furnace is on, i can hear rumbling coming from it. Not sure if this is supposed to be occuring.

Help would be great
Old 01-15-02, 08:14 PM
Sharp Advice's Avatar
Admin Emeritus
Join Date: Feb 1998
Location: The Shake and Bake State USA
Posts: 9,927
Upvotes: 0
Received 5 Upvotes on 4 Posts
Several Possibilities

Hi: Morgation

One of several possible reasons for the furnace to be cycling so often could be do to the heat anticipator setting inside the thermostat.

It's on the thermostat's body just under the front cover.
It looks like a rheostat indicator and usually has a pointer arrow.

The anticipator is used to balance the temperature swings between the desired room temperature and the actual temperature.

If the anticipator swing temperature is set too far, the room temperature will drop too low before the furnace cycles on.

Conversely, the furnace will remain on too long after the thermostats selected room temperature is reached.

Set too short, the cycles will happen all to often.

To obtain the all around best selected average room temperature, set the thermostats room temperature selection and then adjust the anticipator to one of the highest or lowest settings.

Other professionals replying within this forum, may have alternate solutions, suggestions, opinions. Check back several times.

Regards & Good Luck
TCB4U2B2B Company Enterprises.
Fast, Fair, Friendly & Highly Efficient Service.....
Energy Conservation Consultants & Natural Gas Appliance Problem Diagnostics Technicians.

Favorite On The Job Quote:
While Working....."Keep Smiling"
Smiling creates minor workplace distractions, makes bosses and piers wonder what in the &!#@#!$&$#@!%.....&%$##@$#@!@#....are you up to now!".....
Old 01-16-02, 03:00 AM
Visiting Guest
Posts: n/a

check air filter.As Tom stated set anticipator to a longer cycle.PDF
Old 01-17-02, 04:53 AM
Visiting Guest
Posts: n/a
THanks guys,

I have a digital programmable thermostat. Does this have this anticipator that i can adjust and if so where would it be?

Also, i have no experience with furnaces so where abouts would i be looking to replace the air filter?

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: