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Turns on and off 3 times then stats off - Televison & Video

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It is most probable that it takes 3 tries before the capacitors in the power supply have a sufficient charge. Relatively speaking its a simple repair. Have them replaced before something serious happens.

Posted on May 21, 2011

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Posted on Jan 02, 2017

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So on my graphing calculator i put my equation x^3-x^2-10x-8. then i hit graph and it says err:invalid DIM.


INVALID DIM error message may occur if you are trying to graph a function that does not involve the stat plot features. The error can be corrected by turning off the stat plots. To turn the stat plots off, press 2nd then stat plot, and then select 4:PlotsOff. By the way it is easy to graphing function y=x^3-x^2-10x-8.
See captured images: full graph and detail of the left side max


3_4_2012_7_04_47_am.jpg

3_4_2012_7_07_14_am.jpg

As you can see this function have zero values in the points -2, -1 and 4

Mar 04, 2012 | Texas Instruments TI-84 Plus Silver...

1 Answer

Heil heating unit ran out of lp will no restart fan runs no fire up


if you ran out of lp you my need to purge the line. shut off power and crack gas line as close to gas valve as you can.try a 5 sec. count. reconnent and check connenction with soapy water for leaks. if none return power and turn t stat up. if it cycles and doesn't lite turn t stat down and then recycle may take 2-3 times. the fan runs on a timer. when the t stat is in demand the fan will run by turning the t stat down below room temp the fan will shut off.

Jan 29, 2011 | Heating & Cooling

1 Answer

It doesn't want to shut off and we have no heat?


when you say it doesnt want to shut off i'm guessing you mean the fan. the fans run on a timer when the thermostat calls for heat it will come on 90-120 sec.later. turn your t stat down below room temp and it will shut off in 30-60 sec.your ignitor is most likly bad. turn your t stat back up and look at it. it should glow. furnace will try to light 3 times,you may hear the gas flow for 3 sec.during this cycle. if no glow good chance that is your problem and you will need to replace it.be carefull it is very brittle and breaks easy if tapped. be sure to turn the t stat down again or the fan will start running again.

Jan 26, 2011 | Coleman Propane Forced Air Heater...

1 Answer

HELP!! New install of GMUH75-E3A - Main blower starts immediately on power up/ thermostat turn on. Burner never turns on/ignites. AC power is wired correctly and gas supply is connected. Switch is in the...


You need to find out if the problem is in the T-stat, T-stat wire or in the furnace you can do this in a few easy steps

 

Step 1- Unwire the low voltage from the furnace. Then turn the power back on and see if the blower comes on if it does then the problem is in the furnace and you will need to troubleshoot the furnace (see bottom of page for troubleshooting furnace) if it does not then proceed to step 2

 

Step 2- Wire the low voltage back up to the furnace (follow the wiring diagram below). And unwire the T-stat, make sure that no wires are touching each other, then turn the power back on to the furnace, if the blower starts then you have a short in the T-stat wire and you will need to pull a new wire. If it does not then proceed to step 3

 

Step 3- Turn the power back off at the furnace and wire the T-stat back up (follow the wiring diagram below). Turn the T-stat to auto heat 90 if the heat does not start but the blower just runs then you need to replace the T-stat.

 

 

troubleshooting furnace

 

http://www.hvac-for-beginners.com/furnace-troubleshooting.html

 

 

wiring diagram

 

 

 

 

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Nov 24, 2010 | Comfort-Aire Heating & Cooling

2 Answers

Test procedure for elements and thermostat


Remove upper and lower access panels
in upper access, use voltage tester to test voltage of on the uppermost terminals above the red reset button. should be ~220V between terminals (110 to ground)
If not: breaker off or bad,
If 220V proceed:
Test the two terminals immediately below this reset button should be 220V
If not: reset tripped or bad
If 220V present, proceed.
Turn off breaker to heater.

Use ohm meter or continuity tester.
test resistance across upper element terminals -should be 10 to15 ohms
check between each terminal and ground -should be open circuit .
If not replace element
Repeat for lower element.

test across lower element thermostat should be no resistance when stat turned up so it clicks on.
(To test that lower stat turns off, allow tank to heat up completely before conducting this test) Turn sta temp down so it clicks off then test across stat terminals -should be open circuit

The upper thermostat is a 3 way switch
The simplest way to test it is to turn the power back on turn the upper stat all the way up so it clicks on and use voltage tester across the UPPER element terminals, should be ~220V
Now turn the upper stat down so it clicks off- check upper element should be 0 V between upper element terminals -(Caution ! terminals will still be live 110V to ground)
The upper stat has now sent power to lower stat.
Turn lower stat up so it clicks on, check Voltage across lower element -should be ~220V turn lower stat down so clicks off, should be 0 V across lower element terminals.

NOTE If tank is completely cold the upper stat will not switch off and wont send power to lower stat.
If lower tank is cold lower stat may not click off even when turned down.
normal stat setting is 125 to 130
The hotter you you set the stat, the faster your tank corrodes.

Apr 09, 2010 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

Duo Therm AC won't cut off with thermostat


Hi, sounds to me like the thermostat is at fault.You have done nothing wrong to it but cover it up. The t-stat is what controls it, turns it on and off. The only other thing that would keep it on all the time would be that the thermostat wiring could be touching together from the stat up to the unit. You might check that before replacing stat. I have seen this many times.You can start the unit and go up top and disconnect the stat wire and it should stop the unit.Then its either the wire or stat.Let me know what you find,
Sincerely,Shastalaker7

Nov 04, 2009 | Heating & Cooling

1 Answer

Goodman furnace


double check your wiring. R terminal on the furnace will provide 24 volts to the t-stat. W terminal in the t-stat will send 24 volts back to the furnace W terminal to turn on the heat. G terminal in the t-stat will send power to the G terminal in the furnace when the t-stat is switched to fan on. Y terminal in the t-stat will send power to the Y terminal in the furnace which in turn will send 24 volts to the A/C outside. The C terminal in the furnace should be connected to the c terminal in the A/C outside as well as to the T-stat. Check the fuse again

Jun 02, 2009 | Goodman GMS90703BXA Heater

1 Answer

I have a 3 ton Coleman heat and air pump and when I turn the air condition on the heat strip comes on at the same time


If you are calling for heat and the thermostat is set for 2 degrees higher than room temp, the heat pump and strips come on.
When the room temp and stat temp are less than 2 degrees the strips turn off.
That is, unless the installer wired the t-stat for the strips to stay on.
If they are coming on in the air/cool mode then you have a bad heat relay or a t-stat wire shorted.

Mar 11, 2009 | Coleman Heating & Cooling

1 Answer

Too frequent on/off cycle


Is it reaching the temp. set on the T-stat? Is the T-stat digital? If so the differential on the T-stat(the temp.difference between where it turns on and turns off) is probably set at about .5 degrees. I recommend changing it to 1.5 degrees. The instructions to reset it should be in the T-stat manual.

Jan 22, 2009 | Goodman CLQ36AR49 Air Conditioner

1 Answer

Problem with main fan oven - electric


there is an overheat stat and this is operating and cutting out the oven. the causes are several but here are the main things to look for: oven stat is faulty causing the oven to overheat. you should check over the range to see if stat is reasonably accurate. overheat stat itself is faulty. there is another stat which turns on the casing fan. (this is the fan which is out of sight - not the fan inside the oven) if this stat is faulty and not turning on the casing fan, then the overheat stat will operate. the casing fan is faulty or jammed. lack of ventilation. see if you can narrow it down a bit and get back to me if you wish

May 06, 2007 | Belling DB3 Dual Fuel (Electric and Gas)...

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