What is a changeover valve on a heat pump?
The changeover valve is a device which reverses the flow of refrigerant in the heat pump. This will allow the freon to reverse and heat the home or cool the...
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What is a changeover valve on a heat pump?
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Why is a change I made on the Resideo App not showing up on the Honeywell Home T5, T5+, or T6 Pro WiFi thermostat?
There may be a short delay after making temperature and setting changes in the app. Please allow up to 2 minutes for your thermostat to reflect changes made in the...
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Why don?t I see the blue light blinking on the detector?
The Bluetooth times out after five minutes and the LED on the device stops blinking blue. In most cases, this happens if you insert the batteries in the detector before...
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Why doesn't the heating work on my Lyric Round WiFi Thermostat?
If the heat will not come on, complete the following steps: 1. Check to make sure that the sun icon is shimmering. 2. Check to make sure that the thermostat...
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Why doesn't my mp3 doorbell's drive appear when I plug it into my PC?
If you activate a button on the doorbell just as you plug it into your PC, the drive might not be recognized. Unplug and then reinsert the USB connector. Wait...
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Why doesn?t my mp3 doorbell's drive appear when I plug into my PC?
If you activate a button on the doorbell just as you plug in to your PC, the drive might not be recognized. Do not press any key for five seconds...
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Why does the LED light on an RPLS750 flash on the off position?
If the timer 3W wire is on a separate connector when on a single pole installation (Not having voltage at all on it) or connected as a 3W installation but...
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Why Does my Honeywell Doorbell Keep Beeping?
The doorbell beeps twice to notify that the doorbell push battery is low and needs to be replaced.
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Why does the cooling function not work on the Lyric Round thermostat?
It probably means that the compressor is not turning on. Here's how to fix that: 1. Verify that the set point is below the indoor temperature. 2. Verify the "snow...
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Why does my T9/T10 Thermostat fail to power on?
Check your wiring to see if you have a C-wire. If you do not see a wire in the C terminal, refer to your Installation Guide / C-Wire Adaptor Guide...
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Why does my 9000 series thermostat show "sensor error??
Some of the 9000 series thermostats (RTH9585WF, THX9421R, TH9320WF) are displaying 'sensor error' when placed in low humidity installation locations. If the thermostat spent time in a low humidity environment,...
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Can Mold Grow in a HVAC System?
Moisture is often a byproduct of an A-Coil working during a cooling cycle. If not treated, that moisture can produce mold and mildew over time.
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Why do I need dehumidification for my home?
Today's tightly built homes are great for insulation value, but that same insulation prevents the exchange of stale indoor air for fresh outdoor air, trapping moisture from cooking, showering and...
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Why do I get a "Device is already registered" error message when trying to connect my First Alert device?
Ensure you are logging in / using the correct account. Each device can only be registered to a single account. If your device is registered to another user, request the...
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