 |
|
 |
|
 |
01-04-2004, 11:38 AM
|
|
|
New Member
|
|
Join Date: Jan 2004
Location: .
Posts: 7
|
|
|
furnace
WHY WOULD MY FURNACE SHUT OFF BEFORE IT REACHES REQUESTED TEMP ON THERMOSTAT
|
01-04-2004, 01:47 PM
|
|
|
Journeyman
|
|
Join Date: Nov 2003
Location: .
Posts: 440
|
|
|
Welcome to the forum; One reason it would shut off is because it has tripped the High Limit.Did it finally come BACK ON a few minutes later to make up the thermostats set point? OR, without coming back on ,did the thermostat,(after a few minutes) finally show it had reached the set point? Post back with this info and we will advise further. Thanks. There are a couple of reasons why some furnaces do this. Hube
|
01-04-2004, 06:51 PM
|
|
|
New Member
|
|
Join Date: Jan 2004
Location: .
Posts: 7
|
|
Hi Hube
It did come back on but it never reached the requested temp. The temp in the house remained at 15 degrees (C)but we had the thermostat turned all the way up to 25 deg (C). This was over the last 36 hours and the house has gotten no warmer than 15 deg. The furnace will come on for a few minutes then shut off, on for a few minutes then off again.Two weeks ago I had installed a new thermostat and thought this would take care of the problem but it would still get no warmer then 20 degrees(C)and that is when the temp outside -16. I thought this would see us through til after this season but it is now minus 40 degrees out with the wind chill and we are starting to take notice!! Hope you have some helpful hints- thanks for replying
>
Quote:
quote:Originally posted by Hube
Welcome to the forum; One reason it would shut off is because it has tripped the High Limit.Did it finally come BACK ON a few minutes later to make up the thermostats set point? OR, without coming back on ,did the thermostat,(after a few minutes) finally show it had reached the set point? Post back with this info and we will advise further. Thanks. There are a couple of reasons why some furnaces do this. Hube
|
|
01-04-2004, 07:03 PM
|
|
|
Journeyman
|
|
Join Date: Nov 2003
Location: .
Posts: 440
|
|
|
You said you put a new thermostat in. Did you set it to the proper cycle setting?.Are you sure it said was compatible with this type of heating system? What type of thermostat, setback, programmable,? make?Model? Hube
|
01-04-2004, 11:23 PM
|
|
|
New Member
|
|
Join Date: Jan 2004
Location: .
Posts: 7
|
|
Hi Hube the instructions said to take the numbers of the old unit (thermostat)and i checked them with the one on furnace also the range of numbers (0 to 9.5 A) Our furnace was 6.5A .The thermostate is a honeywell dial (2) wire Mercury switch model.I don`t know what you mean by (setback)Thanks.
Quote:
quote:Originally posted by Hube
You said you put a new thermostat in. Did you set it to the proper cycle setting?.Are you sure it said was compatible with this type of heating system? What type of thermostat, setback, programmable,? make?Model? Hube
|
|
01-04-2004, 11:31 PM
|
|
|
New Member
|
|
Join Date: Jan 2004
Location: .
Posts: 7
|
|
The inst said to use the numbers off the old thermostat and i looked on the unit also just to confirm. the new thermostat is a honeywell two wire mercury switch dial.
Quote:
quote:Originally posted by Hube
You said you put a new thermostat in. Did you set it to the proper cycle setting?.Are you sure it said was compatible with this type of heating system? What type of thermostat, setback, programmable,? make?Model? Hube
|
|
01-05-2004, 07:29 AM
|
|
|
Journeyman
|
|
Join Date: Nov 2003
Location: .
Posts: 440
|
|
|
Fire guy; Ok, the thermostat sounds ok to me. Tell me, when the burner kicks in and then shut off a few minutes later, does the blower (fan) come ON and run for a few minutes? Or does the blower (fan) Not ever come on? Hube
|
01-05-2004, 08:08 AM
|
|
|
New Member
|
|
Join Date: Jan 2004
Location: .
Posts: 7
|
|
Hube The blower fan does come on , and the burner continues to run . Its like the furnace has an internal thermostat and shuts itself down?.But the fan will run for A period of time after. thanks Fire Guy
Quote:
quote:Originally posted by Hube
Fire guy; Ok, the thermostat sounds ok to me. Tell me, when the burner kicks in and then shut off a few minutes later, does the blower (fan) come ON and run for a few minutes? Or does the blower (fan) Not ever come on? Hube
|
|
01-05-2004, 08:57 AM
|
|
|
Journeyman
|
|
Join Date: Nov 2003
Location: .
Posts: 440
|
|
|
Ok, like i said in my FIRST reply to you; it could be a faulty, or incorrect setting of the "High Limit Control. This is sometimes adjustable. Look it over . There can be a fan on and off setting, and a High (safety) setting. Let me know, Hube
|
01-05-2004, 10:04 AM
|
|
|
New Member
|
|
Join Date: Jan 2004
Location: .
Posts: 7
|
|
|
Hube On my furnace the control unite has fan control and a guage that I belive to be high limit control control, the numbers on it are 110 - 150 where should it be. and is that the high limit control. Fire Guy. Thanks
|
|
|
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
|
|
|
| Thread Tools |
|
|
| Display Modes |
 Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Stats |
Members: 10,155
Threads: 6,799
Posts: 28,105
Top Poster: HayZee518 (3,841)
|
| Welcome to our newest member, mkholihan |
|
» Links |
|
|
» Online Users: 52 |
| 0 members and 52 guests |
| No Members online |
| Most users ever online was 388, 07-01-2007 at 02:54 AM. |
|
