Question about Honeywell Electronic Programmable Heat/Cool Thermostat - CT3300A100 Heater

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The word return on the thermosts

The word return just appeared on the screen of our thermostat. What does it mean and how can I get it to go away?

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It is part of the 7 day timeclock function, you should be able to take the timeclock program out of your settings and it wont come up again

Posted on Jun 16, 2009

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Posted on Jan 02, 2017

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What are bolt sizes on thermostat housing?


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    Automotive Racing Products20 kits found for Thermostat Housing Bolts ... These premium grade bolts are engineered to properly engage the manifold threads and ... Thread Size 1, 3/8?.

    Thermostat housing bolt size questions ' IH8MUD Forum

Dec 05, 2015 | Cars & Trucks

1 Answer

Totaline Thermostate P274-1100 works fine when following programming but when I adjust the temperature manually it will start the furnace and after a few minutes the screen displays E2 error, blanks out,...


E2 is the error code for low line voltage. I would think that this is a erroneous code witch would indicate that the thermostat is defective. do you know if this is true line voltage 120v or transformer voltage 24v?

Mar 05, 2014 | Carrier Totaline P291-1003 Capacitor 10mfd...

1 Answer

Ritetemp 8022c


After you program the thermostat..the temperature numbers stays on the screen a few seconds then starts to indicate the temperature of the room. This is normal.

Nov 29, 2013 | Heating & Cooling

1 Answer

Locked out of thermostate


From the manual:



PROGRAMMABLE KEYPAD LOCK
To prevent tampering with any of your settings or
temperatures, the front panel buttons and the rotary dial can
be locked out, requiring a four digit code to unlock them.
You may use either the default lock code of "0000", or your
own personal number combination (see "Changing The Lock
Code")


LOCKING THE THERMOSTAT: Ensure the rotary dial is in the
RUN position. Press the NEXT button for at least 2 seconds.
The words "ENTER CODE" will appear on the screen, along
with "0000". Press the NEXT button again for at least 2
seconds. A padlock should appear on the screen to confirm
that the thermostat is now locked.


LOCKING THE THERMOSTAT: Ensure the rotary dial is in the
RUN position. Press the NEXT button for at least 2 seconds.
The words "ENTER CODE" will appear on the screen, along
with "0000". Press the NEXT button again for at least 2
seconds. A padlock should appear on the screen to confirm
that the thermostat is now locked.

UNLOCKING THE THERMOSTAT: Ensure the rotary dial is in
the RUN position. A single press of any button should cause
the words "ENTER CODE" to appear on the screen, along
with "0000". If the default code was used to lock the
thermostat, press the NEXT button for at least 2 seconds.
The padlock should disappear from the screen, and the
thermostat should now be unlocked.
If you try to unlock the thermostat by entering a code that is
not correct, a padlock and the digits "88:88" will flash on the
screen and you will have to try again. If a lock code
different from the default was used, this will need to be
entered by using the UP/DOWN buttons, and the NEXT
button to advance to the next digit. Once the correct code is
entered, press the NEXT button for at least 2 seconds and
the thermostat should now be unlocked.


CHANGING THE LOCK CODE: To create your own specific
lock code, first ensure that the rotary dial is in the RUN
position. Press the NEXT button for at least 2 seconds. The
words "ENTER CODE" will appear on the screen, along with
"0000". Now press the HOLD button again for at least 2
seconds. The words "SET CODE" will appear on the screen,
along with "0000".

IF YOU FORGOT YOUR LOCK CODE: You can still unlock the
thermostat by performing the following steps: On the back
of thermostat locate JP1, which is a row of 3 metal pins at
the right edge of the circuit board above the battery tray.
There should be a plastic jumper cap on 2 of the 3 pins
(right or left).


Move the jumper cap so that it is on the opposite 2 pins.
For this change to be recognized, move the Temperature
Mode switch to any other position than its current one.
These steps listed should have changed the lock code back
to the default of "0000". Follow the instructions already
listed in "UNLOCKING THE THERMOSTAT".

Sep 02, 2012 | Lux Tx9100e 7 Day Universal Programmable...

1 Answer

Thermostate does not controlheat


It appears that the thermostat is stuck closed. These units are made very cheaply and there are many many problems with these units. They are throw away units. They do not have parts that are serviceable or a reasonable price. You can buy a new one for what the service call or even the parts will cost. Sorry for the bad news but I have answered this question many times for many different people on here.
Hope this helps you.

Jan 27, 2011 | Lakewood Oil-Filled Electric Radiator...

1 Answer

My power switch broke and need to get a new one. Does onyone know where i could purchase a new thermostate switch or should i throw it away?


If your talking about the thermostat you will have to throw it away. You can buy one at any Lowe's, Lumber Yard or Home Depot.

Jan 02, 2010 | DeLonghi Heating & Cooling

2 Answers

My 330d will only blow cold air the engine doesnt appear to be over heating but is lossing a bit of water?


It may be you heater matrix that may be faulty also check the thermostate by taking this out and put the tjerostate in hot water if it opens then it will be your heater matrix that is at fault.

Dec 21, 2009 | 2001 BMW 330

2 Answers

Water was boiling and spraying from overflow / reservoir tank from what appears to be a factory made hole. was there a plug in there that might have rotted off and caused this?


well that mean that oone your thermostat is not opening or your water pump or possible that a hose might be collapsing to cause the water not to flow

May 25, 2009 | 2000 Chrysler LHS

1 Answer

No heat and thermostat light just came on


it is either low on coolant or the thermostat is sticking

Jan 01, 2009 | 1999 Dodge Caravan

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