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lockout

  1. HVAC
    I would like to disable second-stage heat completely on my Carrier furnace. How can I do that? Why? => My Carrier furnace often goes into "limit switch fault" and then "limit switch lockout" (more info below). I'm pretty sure this only happens when switching into the second stage and I want...
  2. HVAC
    I installed a new Prestige THX9321R5000 Stat with wireless OD sensor on XL14i HP, with 15kw of Aux at AH. It is configured with an ODTa on condensor to call for Aux Heat on defrost cycle if temp < 35*. However, the Stat locks out Aux Heat if temp > 30*. Was wondering will the new stat override...
  3. HVAC
    I have 2 Amana Air Command Hi Efficiency 90 gas furnaces. They are both about 12 years old. One has had service three times in the last month and a half and the symptom is always the same….blowing cold air. First they replaced the thermostat? Next they replaced the igniter with an upgraded...
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