Question about Honeywell Programmable Thermostat Heater

3 Answers

Dy/night heater turns on for 10 sec then and off, over and over

Honeywell thermostat #CT3600A4444 9816

Day /night heater model #8ou-19

I called honeywell and the technician said it was not the thermostat, he thought it was the 'limit switch' in the heater. I unplugged the heater and plugged it back in and it still cycles on and off. We tried everything it said on the website.

Posted by on

3 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Brigadier General:

    An expert that has over 10,000 points.

  • Master
  • 6,966 Answers

Hi and welcome to FixYa,

If I understand your concern, it is that the heater switches itself on for 10 seconds and then switches itself automatically off. A couple of ideas of you may want to explore/check:

  1. the built-in protection system detects an internal fault and to prevent any further damage switches itself off;
  2. the faults could be:
  • open heating element (assuming it is electrical);
  • blower not turning;
  • open limit switch. The limit switch is an inline cutoff to the heater that automatically opens up when the heater exceeds a pre-determined temperature independent of the settings in the thermostat. This is like a thermal fuse once gone bad will remain open;
  • whereas a thermostatic switch will turn on if temperature is below its threshold and turn off if the temperature is above. It is basically an on/off switch.
Often the limit switch would look like the image below.
Dy/night heater turns  on for 10 sec then and off, - 7d0829b.jpg
To be able to provide a more detailed information/assistance, pls verify & post back the model number of the Day Night Heater. Model 8ou-19 does not turn up anything. Or perhaps you can share the website you were referring to.

Good luck and Thank you for using FixYa. Happy Holidays.

Posted on Dec 21, 2008

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

  • Expert
  • 327 Answers

The components on the main circuit board needs to be checked as they gets heated and it turns off.so make it checked and replace the faulty.it will work.

Posted on Dec 16, 2008

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

    Champion:

    An expert who has answered 200 questions.

  • Expert
  • 304 Answers

It is better to test and check the panel board, a malfunction on the switch causing ths problem

Posted on Dec 16, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

HONEYWELL THERMOSTAT HEATER DOES NOT TURN ON BUT AC DOES HAS 4 TIME DAY PROGRAM


Plz check your setting day and time for heater and also the setting temperature

Nov 27, 2010 | Honeywell Programmable Thermostat Heater

1 Answer

Honeywell thermostat TH6110D1021. Blower comes on


Hi, You are right, fan is on a time delay in the heating cycle, and after burners fire that is when this delay comes into play. You have a preset factory temperature that determines the cycle on time for the fan, and the off time after the burners shut down also. This will not be in the thermostat, but in the fan/limit control the is mounted on the face of the furnace, with a probe inserted into the fire box.Depending on how old or new this unit is, will depend on the type control you have.It may be just a high limit switch, or the 1st I mentioned.If so, It rotates in the burner as the temperature rises, to turn the fan on and off.Disconnect power, remove cover, and 2 screws.Slowly remove the control and gently clean the probe. Turn the dial if this one has it and you will be able to hear it click. This click is contacts closing to start fan operation.Reinsert and try again. If problem continues, you will have to replace it.They do tend to stick closed/on, in the heat cycle from time to time and a cleaning sometimes will solve this problem. Not knowing how old this furnace is and type, make it difficult to give you a correct diagnosis, so check this fan control as I have explained, and if your system is of a different type, please let me no so I can correct this problem. Sincerely,
Shastalaker7

Dec 11, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

NEED HELP PROGRAMMING MY RTH230 JUST PURCHASED IT


when programming the thermostat, you must program each day of the week, then sat / sun , next program for morning day anf night, set temp and then push run program button

Oct 18, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

Day / Night HVAC is running cool air BUT the furnace is running 2


Strange. Does the thermostat control both the air conditioning units and the furnace. If not make sure the furnace thermostat is turned down to below 65 degrees.

Jun 29, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

Control Rheem water heater temperature based on schedule


This is probably not what you really want to do. It will use more energy to reheat the tank than maintain a full tank of water.

Jun 25, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

My Honeywell chronotherm IV Plus thermostat intermittent problem


The Chrono Therm 3 and 4's were some of the worst products that honeywell has EVER put out. I would suggest switching to the Vision Pro 8000, please consult your local HVAC company for more information regarding the change over.

May 11, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

Heater on when not programmed


sounds like a bad t-stat , they have a 5 year warranty on them

Dec 28, 2008 | Honeywell Programmable Thermostat Heater

2 Answers

Red LED on honeywell r6660d


The problem is that the 2 units are "not speaking to each other". this could be caused by low batteries or a loss in signal caused by a powercut or an objection in the way of the 2 units.

first you need to turn the power off to the r666od (or otherwise known as the HC60NG) for 10 secs, then turn back on. then hold the grey button in for 15 secs. release then hold in for a further 5 secs.

go to the honeywell cm61 press the off button. hold temp up. temp down and prog 1 in for 3 secs until the dipslay goes to INST. at this point release all 3 buttons then press the i button until a beacon starts flashing.

this is now the end to your problem.

N.B the reason the green light was on is because the man override button will have been pressed.

hope this helps

Nov 14, 2008 | Honeywell Programmable Thermostat Heater

Not finding what you are looking for?
Thermostats Logo

707 people viewed this question

Ask a Question

Usually answered in minutes!

Top Honeywell Thermostats Experts

Bill Long

Level 3 Expert

577 Answers

paulcarew

Level 3 Expert

1899 Answers

Brandon Berry
Brandon Berry

Level 2 Expert

407 Answers

Are you a Honeywell Thermostat Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...