06:05PM | 10/20/04
Member Since: 10/19/04
7 lifetime posts

I recently purchased a house and with the colder weather I began to notice that I may have a problem with the heating system. The furnace is a Carrier WeatherMaker 8000 two-speed. The programable thermostat is a Honeywell. First, the furnace only works with one speed. I've never seen it working at a different speed as the user manual indicates. What can be wrong? Is it the thermostat? Do I need a Carrier thermostat for the dual-speed functionality?

Second, the furnance seem to work hard to heat the 2800 sqft house (two stories). Is the furnance too small for a house this size? The house was renovated and extended. The original house was around 1800 sqft. With the new addition, there are more vents and ducts.

And the last problem, one of the rooms (which is part of the old house) has very low airflow to it. I checked the ducts in the basements, all joints are well sealed with aluminum tape. What can be wrong?

Your advice is appreciated.


06:32PM | 01/12/16
58zav. Blower comes on, gets to the 76 degreesdegrees set on thermostat, starts to blow cold air (normal) but won't shut off. It gets below 76 degrees again and the ignition turns the burners back on, it never wants to stop this continuous cycle.
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