honeywell thermostat not working after power outage

Once power is restored the thermostat will resume its previous settings and configuration. The TH9421C1004 is attached to a control unit.

How To Reset Honeywell Thermostats All Models Guide Home Inspection Insider

The blower works when turned.

. Ad A Technician Will Answer You Now. Turn off your thermostat. All you have to do is put the switches back in position.

Checked the fuse in the blower. I didnt have a blank thermostat but my thermostats have battery back-up power so if the furnace power was on the blink they still function. You dont want your thermostat to be on and signaling the system when completing the later steps in our process that involve electricity.

Power outage - Answered by a verified HVAC Technician. I have confirmed power in the blower power at the thermostat. Check the batteries One of the most common causes for issues with thermostats is the battery running out.

Check if any fuse is blown or not. Questions Answered Every 9 Seconds. It is common for some problems to be reported throughout the day.

Heres the checks Ive. No power to thermostat after power outage. I have forced air.

Go To Your Breaker Panel A power outage can cause breakers to trip but they are easily reset by turning the breaker off and then back on. A C wire connected to C on the equipment is required for the thermostat to power itself. When time is set it goes back online and controls the HVAC.

Check to make sure that any GFI outlets attached to or near the furnace have not tripped. Theres a Goodman air handler outside and furnace inside. This mainly happens after a power outage.

When power is restored thermostat comes back with set date then set time. Honeywell outages reported in the last 24 hours. Our house was new construction roughly 2 years old.

Power outages can cause these outlets to trip. When power is lost to the thermostat the only information it loses is the current time. With that being said if your thermostat backlight is still not working after replacing the batteries see the next troubleshooting step.

Yes the battery should be able to keep the clock settings right but it. Your backlight may stop working because of a tripped circuit breaker. Its been almost two hours now and the room has cooled 3-4 degrees.

To fix this problem just press the reset button on the GFI outlet. After a power outage our thermostat is not responding and will not turn on. Another thing to check is the circuit breaker.

If the thermostat shows you that it is in setup mode you just have to set your thermostat again and the problem will be solved automatically. It fired back up no problem. Check Your Circuit Breaker.

The reason the light is flashing is that the power outage has switched the thermostat back to setup mode. Power outage around 430 pm. Hello my basic Honeywell thermostat went blank this morning after a two minute power outage and has not come back on.

Clogged air filters cause a Honeywell RTH230B to stop working entirely or increase heating and cooling bills. Once the thermostat is off you can. If your previous thermostat did not use a C wire its unlikely that it is connected at the equipment.

Reset your circuit breaker and replace blown fuses after electrical surges or power outages to fix your Honeywell RTH230B thermostat. Find the breaker box in your home and flip the breaker for the AC to the off position. If its out for an extended period of time your thermostat may reset to the factory default and you will either need to read your manual or have an HVAC contractor handle the reset if its complex.

Before doing any other troubleshooting start by finding your thermostat and turning it off. Check the Circuit Breaker. This is a common cause behind thermostats not working after a power outage but fuses can be replaced.

Confirm you have a C wire in the C terminal. Honeywell RTH230B thermostats stop working when the breaker trips a fuse blows and the batteries die. It is highly likely that after the power outage a switch may have flipped in the circuit breaker.

Inspect your circuit breaker and replace blown fuses if resetting the thermostat doesnt work. A blown fuse is one of the most common reasons for a thermostat to suddenly stop working especially after a power outage. Power back by 515 now thermostat wont light up Tried to change on my phone but not working.

Your digital Honeywell thermostat may not work properly even if the screen is okay but the time-of-day and day-of-week are incorrectly set. Hold the reset button on your thermostat for 5 seconds if its not working after a power outage. It will also automatically reconnect to the Wi-Fi network.

Go To Your Breaker Panel A power outage can cause breakers to trip but they are easily reset by turning the breaker off and then back on. Downdetector only reports an incident when the number of problem reports is significantly higher. If thats whats causing the thermostat to not work its an easy fix.

Date screen may be correct but requires manual action Done Screen then goes to set time and is always at 100 PM - so it does not retain the time and has to be manually set. When a Honeywell thermostat is in setup mode it normally causes the Cool on light to blink. This chart shows a view of problem reports submitted in the past 24 hours compared to the typical volume of reports by time of day.

Once thats done you can proceed to restart the HVAC system via your thermostat. Hello so we had a power outage for about 1 hour due to a storm and after power was restored I noticed both thermostats up and downstairs had no power blank display. Its 26 degrees outside.

After a brief power outage the Honeywell TH9421C1004 thermostat is a blank screen. Yes the thermostat stores the set point and schedule. Lastly if the power was out for more than 5 minutes you may want to check that the thermostat did not reset.

First check the manual for safety instructions. Three wires going into the thermostat. Verify the furnace air handler door is closed the power switch is on and the breakers are on.

If your thermostat isnt working after a power outage or surge theres hope. Otherwise you can remove the batteries and place them back in the compartment to reset your thermostat if it isnt hardwired. Heres an easy four step process to resetting your thermostat after a power outage.

I eventually solved it by simply pulling out the quick-disconnect for the exterior heat pump AC and then re-connecting it. This includes inspecting your thermostats fuses so youll need to remove the front panel and check for blown fuses.

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