You are here:
Residential and light commercial HVAC questions
40 years of HVAC Service
Refrigeration Service Engineers Society
HVAC Certificate, Trane Comfort Specialist, NATE certified Heat Pump Technician
| User | Date | K | C | T | P | Comments |
|---|---|---|---|---|---|---|
| John | 11/06/09 | 8 | 8 | 10 | 10 | thank you. I'll do some cleaning. |
| JOAN | 11/03/09 | 10 | 10 | 10 | 10 | Thank you so much for your quick ..... |
| Ernie | 11/03/09 | 10 | 10 | 10 | 10 | Thanks! We had 2 other techs come ..... |
| John | 11/02/09 | 10 | 10 | 10 | 10 | Thank you I will trouble shoot. |
| Lucy | 11/02/09 | 10 | 10 | 10 | 10 |
If the pump must work both summer and winter you would have to break the "R" wire with the safety switch to prevent water damage if the pump didn't work. Hopefully you are not away for extended periods
There is normally either a switch(physical) inside the thermostat or a setup option(programming) to set the fan for either gas(fossil fuel) or electric/heat pump operation. In the gas setting the furnace
Yes you would need a heat pump capable thermostat. With only 4 wires to the t-stat you are not running a 2 stage heat pump. The wires to the t-stat should go to R,Y,G and either B or O(depending on whether
An open high limit can be from a previous cycle of the furnace. This can be due to overheating from a restriction of the airflow( dirty filter,blower wheel,evap. coil or closed supply registers). The limit
Although the cost may seem high compared to the "internet" price of the part you must realize that the company must order/pickup the part,deliver it to your house with a service technician to install it
Answers by Expert:

©2009 About.com, a part of The New York Times Company. All rights reserved.