1. Thermostat Issue. One of the first things to consider when your furnace isn't working is that
your commands are simply not reaching the machine
, meaning there could be a problem with the thermostat you use. The issue could be as simple as a lack of power, as some need batteries to operate.
Will a bad thermostat cause the furnace not to work?
Malfunctioning thermostat: A faulty thermostat can lead to problems with the fan or comfort levels. The
furnace doesn't heat at all
: A furnace that doesn't perform its main task may have problems with the thermostat setting, power, gas or the pilot light.
How do I know if my furnace thermostat is bad?
HVAC system won't turn on
: The most obvious sign of a bad thermostat is that the HVAC system in your building won't turn on or respond to the thermostat. You should be able to turn on your heating or cooling system from the thermostat, or change operation back and forth from heating to cooling.
What would cause a furnace not to kick on?
If your furnace is not kicking on, it can be
an issue with the thermostat
. You should first make sure that the thermostat is switched to the heating function. … You may also have an internal problem with your thermostat, which needs to be repaired by a professional.
Can thermostat damaged furnace?
If the smart thermostat takes too much it can short-circuit the furnace. Overtime, this can lead to
serious damage
and even complete failure of the furnace. However, this is almost exclusively a problem for old furnaces. … If you've bought a furnace in the last few years, this shouldn't be a problem.
How do I fix an unresponsive thermostat?
If the thermostat is still unresponsive, make sure
the breaker is shut off and remove the cover
. If it looks dirty inside, use canned air or a soft artist brush to clean away accumulated grime that may be affecting its functionality. Then look for issues like loose wiring or terminal screws and tighten them up.
What would cause a thermostat to stop working?
Look for and address simple reasons why the thermostat isn't getting power, such as dead batteries or
a tripped breaker or blown fuse in your
main electrical service panel. If you're certain it's receiving power, shut off the thermostat breaker in order to safely take off the cover and examine the inner components.
How do you check if a thermostat is working?
Twist the R and G wires together and turn the HVAC breaker back on
. The fan should now be working. After the test, turn off the HVAC power and untwist the wires. If the HVAC passed all of these tests, the thermostat is faulty and needs to be replaced.
How do you test a furnace thermostat?
- Step 1: Reset the thermostat lower or higher. …
- Step 2: Make sure the thermostat is ON. …
- Step 3: Check the wiring. …
- Step 4: Turn breaker back on. …
- Step 5: Reexamine wires. …
- Step 6: Wrap wires together.
Is it hard to replace a thermostat?
Upgrading to a thermostat that automatically changes the indoor temperature setting is fairly easy, and it can trim about $180 off your annual heating and cooling costs, according to the EPA. Simple models that only control heat are sold at home centers for around $25.
How do I get my furnace to kick on?
Check your thermostat.
Make sure the temperature control settings are set to above the current room temp. Also, make sure it is on the HEAT or AUTO setting. You can try to get the furnace to turn on by
setting the thermostat to as high as it will go
.
Locate the reset button on the furnace and press it to reset the furnace. It is usually located
inside the blower compartment on the side of the blower motor
. Be cautious as the housing may be hot. If the button is popped up, press it down.
Why does it take so long for my furnace to kick on?
When a furnace takes longer than usual time to kick on like that, whether it's the first time you've turned it on in the fall or the end of winter, what's happening is that
the furnace is trying to ignite, failing, and then trying again
. I've heard of some older furnaces taking as long as an hour to finally heat up.
Do all thermostats work with all furnaces?
Not all thermostats are compatible with existing HVAC systems, especially smart thermostats!
Some thermostats work only with furnaces and air conditioners
, for example. Others may be designed to monitor heat pumps or multiple-stage heating and cooling systems.
What happens if your home thermostat is not working?
A broken thermostat is more than an annoyance—it could quickly cause your house to get
uncomfortably hot or cold
, and it often leads to substantial energy waste as well. However, similar problems can occur if the AC unit or furnace has an issue or if the ductwork in your house is leaking.
