Furnace won't shut off

Problems related to residential installations.

Furnace won't shut off

Postby drosera » Sat Dec 24, 2011 2:22 pm

Hi.

We have an Olsen bcl-120s furnace and a York model thermopump. These are connected to a Robertshaw thermostat for bi energy regulation. At -12 Celsius, the furnace is supposed to be the source of heat for our home. However, when this happens, the furnace no longer follows the thermostat settings and burns non-stop, only pausing to prevent itself overheating. Our house overheats terribly. We have been looking online at wiring diagrams to see if we could diagnose/fix the problem ourselves, but haven't found anything helpful.

This only started happening after a service technician rewired the thermostat.

Can anyone suggest something to help us?

Thank you.
drosera
Minimal
 
Posts: 1
Joined: Sat Dec 24, 2011 2:14 pm

- Furnace won't shut off

Postby Freon » Sat Dec 24, 2011 11:15 pm

Simple answer... call that specific technician back since he knows what he did and you can tell him what the result was of his wiring.
Freon
Most Valued Contributor
 
Posts: 734
Joined: Sat Jun 18, 2011 11:26 am

- Furnace won't shut off

Postby gibby » Fri Jan 20, 2012 9:24 pm

if tech won't return , pull stat off wall and make sure wires are not touching one another, check W wire may be touching on G
gibby
New Contributor
 
Posts: 4
Joined: Fri Jan 20, 2012 8:52 pm

- Furnace won't shut off

Postby how » Fri Jan 20, 2012 9:34 pm

Would not a crossed connection between R & W be the cause of a constant call for heat. All the electronic in the thermostat only connect the power supply coming to the thermostat to power the heating between these two connections. All the other wires are just aux functions.
how
Most Valued Contributor
 
Posts: 87
Joined: Sun Nov 27, 2011 9:07 pm


Return to Residential