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Question posted by clee7580 on October 26th, 2021

Blowing Cool Air Not Heating Up The House Making Clicking Noise

My thermostat is making a clicking noise and red flashing light change the batteries still makes clicking sound and now it's blowing cool air what do I do

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Answer #1: Posted by SonuKumar on October 26th, 2021 5:03 AM

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SonuKumar

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Why is my thermostat constantly clicking?

The underlying cause of a clicking thermostat is purely mechanical. A thermostat has a circuit inside it that is connected whenever your thermostat realizes it needs to change the temperature. ... This is perfectly normal, and it usually means your thermostat is working how it should.

Most people report hearing a click when their thermostat turns on, but this is technically false. Your thermostat is actually always on as it monitors the air temperatures in your home. The click you hear is actually a signal that your air conditioner or heater is turning on. Most people will hear it when your system first turns on, and there may be some clicking when the system turns off as well.

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Related Hunter 40120 Manual Pages

Owner's Manual - Page 1

Electronic/Mechanical Thermostat installation and operation manual Model 40120 1 44018-01 04-01-2008

Owner's Manual - Page 3

Table of Contents Important Information 5 Tools 6 Uninstalling the Existing Unit 9 Installing the Thermostat 12 Installing the wall plate 14 connecting the wires 15 attaching the thermostat 17 Operation 20 Indicators & Adjustments 22 Troubleshooting 25 Wiring Diagrams 27 3

Owner's Manual - Page 4

Your new Hunter thermostat will provide years of reliable service and year-round energy savings. Electronic/Mechanical Thermostat Model 40120 Congratulations! Thank you for complete operation instructions. 4 Please read this manual before beginning installation and save this booklet for choosing a Hunter thermostat.

Owner's Manual - Page 5

... systems or 110/220 V baseboard heating systems. If you are unsure what kind of heating and cooling system you have, please contact a qualified HVAC Technician for assistance. 5 Electronic Ignition Gas - Millivolt Systems Oil - Standing Pilot Gas - Fired Furnace Electric Furnace This thermostat is designed to work on the following heating and cooling systems: Gas - Fired Boilers...

Owner's Manual - Page 6

To install your new thermostat, you will need the following supplies: Flat-head screwdriver Small Phillips-head screwdriver Hammer Electric drill and 3/16" bit Two fresh 1.5 Volt (AA) size alkaline batteries 6 Tools This thermostat includes two #8 slotted screws and two wall anchors for mounting.

Owner's Manual - Page 7

NOTICE! Do not disconnect the wires from the existing thermostat before reading these instructions. The wires must be labeled prior to removal to ensure proper reconnection. 7

Owner's Manual - Page 9

... to the HVAC system OFF at the main power panel or at the furnace. 2. Turn the system power OFF from the wall. (Some thermostats may have doors that must be connected to expose the wires and mounting screws.) 9 Locate, but do not disconnect the wires. (If wires are not ...

Owner's Manual - Page 10

If your existing thermostat is marked... RH / r / vr / 4 w / h g / f label the wire with this sticker: 24 Volt RH heating W fan G G W RH * See page 27 for complete wiring diagram. 10

Owner's Manual - Page 11

... C, do not always comply with standards, so wire color should not be ignored. You may be a Common wire and should be used only for non-battery powered thermostats. 5. Using the provided stickers, label each wire and remove the existing wall plate. 11

Owner's Manual - Page 12

Wall Plate Thermostat 12 installing the thermostat INSTALLING THE THERMOSTAT 1. Remove the new thermostat from the back plate by pulling the two halves apart.

Owner's Manual - Page 14

...wall plate, or if there are flush with the wall. 6. Insert the mounting screws through the opening . Verify that the thermostat is visually level and securely tighten both screws. 14 If the existing holes do not match those on the wall and pull the...Tap the plastic anchors into the anchors. Remove the wall plate and drill two 3/16" holes where marked. 5. installing the thermostat, cont.

Owner's Manual - Page 16

... black terminal shields. Tighten each screw after the connection has been made. (The ends of any excess wire length back into the wall.) 3. installing the thermostat, cont. Push any extra wires should be wrapped in electrical tape and carefully pushed back into the wall to the terminals as shown. Match and...

Owner's Manual - Page 20

System Switch Thermometer Set Temperature Slider SYSTEM OFF 90 HEAT 90 30 80 80 70 20 70 60 60 AUTO 50 10 50 ON F C F Fan Switch Battery Indicator 20

Owner's Manual - Page 21

Select Off or Heat. 3. Note: In Auto , The fan will be turned on along with normal operation of the thermostat. In a normal gas or oil furnace, the fan will be located in the Auto position. The Fan Switch should normally be turned on by your ...

Owner's Manual - Page 24

... Span Adjust counter clockwise. 4. The Span setting remains the same in both the Heat and Cool modes and can be changed regardless of what position the System Switch is 0.6oF - 3oF. To make your system should cycle 3 - 5 times per hour. Remove the thermostat from the wall plate. 2. Indicators and Adjustments, cont. For maximum system efficiency...

Owner's Manual - Page 25

... heating or cooling will not turn on or off position. 2 a. Check the circuit breakers and switches to ensure there is set to the system. 1 c. If applicable, make sure the furnace blower door is in the off . 1 a. Check the HE/HG switch to ensure it is enough power to the correct position. 1 b. 1. Replace the batteries...

Owner's Manual - Page 10

If your existing thermostat is marked... RH / r / vr / 4 w / h g / f label the wire with this sticker: 24 Volt RH heating W fan G G W RH * Vea la página 27 para el digrama eléctrico completo 10

Owner's Manual - Page 27

wiring diagrams 2-wire Heat Only System Rh W Heat 24V or Heat Relay Millivolt Supply or Valve 3-wire Heat Only System G Rh W Fan Heat 24V Relay Supply Heat Relay or Valve 27

Owner's Manual - Page 10

RH / r / vr / 4 w / h g / f label the wire with this sticker: 24 Volt RH heating W fan G G W RH * Voir la page 27 pour le diagramme de câblage complet 10 If your existing thermostat is marked...

Owner's Manual - Page 27

wiring diagrams 2-wire Heat Only System Rh W Heat 24V or Heat Relay Millivolt Supply or Valve 3-wire Heat Only System G Rh W Fan Heat 24V Relay Supply Heat Relay or Valve 27