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Wiring masterstat - cooler won't start; plastic control box

I installed a new masterstat control box and thermostat. The thermostat works fine but the cooler doesn't start up. It has a plastic control box. Do I need to attact the ground wire coming in from the power souce to a metal surface?

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  • denise812 Apr 30, 2009

    Ours is not starting up either and we have had to replace the control box already once. The thermostat works fine and we just want another control box but we can't find just the control box - they sell the whole kit.

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SOURCE: Need a wiring diagram for mastercool evap 2 stage unit

I have the wiring diagram in the cooler. I can photograph and send it to you. Do you still need it?

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SOURCE: Swamp cooler starts up automatically after power outage

generally ther thermostat is the "brain" of the system, check the wiring diagram (if there is one) or the wiring and see if the on off swtch is inseries or parallell to the thermostat, (should usually be in series if it is I would say that the on off switch is the culprit. you cna verify with an ohmmeter to see if it is staying in the closed position.

Posted on Jul 19, 2009

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SOURCE: thermostat wires dead

If you have a split system (an air handler that blows air into your house and an outdoor unit that has the compressor and condenser coil/fan), then you should look in the electrical compartment of your indoor unit and see if you can locate a low voltage fuse. This is usually located on the control board or between the transformer and "R". Make sure you shut off the power to your indoor unit first as they will still be 240volts available there. If the fuse is blown, replace it and reinstall your thermostat. Turn the power back on. If the thermostat is wired properly with no damaged wires in the process, the system should work fine.
If there is NO fuse, then check the low voltage side of your transformer using a Voltmeter. You will have to have the power on to perform this test. Be very careful. On one side of the transformer, you will read 240volts. The other side should read 24 volts. If there is no voltage on the 24volt side, you blew the transformer and will need to replace it.
Check these items first. If you need further assistance, let us know and we will dig a lil' deeper. :-)
24%20v%20transformer.jpgpicture of a typical transformer.

The low voltage fuse could be a glass cartridge fuse (systems typically older than 15 - 20 years old). Newer systems use the same style fuses that are used in your truck or car (ATC type).

Posted on Apr 08, 2010

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hi.Does the new thermostat has the same rating with the old one?

Posted on Jul 23, 2011

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Is there a youtube video replacing analog with lcddometic ctrl kit 3313189.000


Not that I am aware of but it is pretty straight forward. First, turn off the breaker to the AC. Then uplug the upper unit from the control box, Then disconnect the 110vac from the box, and then clip the thermostat wires. There will be, typically colored blue, two wires which go to your furnace, a ground wire and a 12vdc hot wire. The two blue wires will get the insulated female spade terminals installed so that they can be directly plugged into the new control box. The 110vac will wire into the new box the same as it was in the old box. The upper AC harness will plug directly into the new box and the new freeze control will plug directly into the new box and the yellow card will show you where to install it into the coils for the best results. You will receive a new harness that will supply power to the thermostat. Each wire is identified with a label and there is also a schematic on the inside lid of the new control box. Pick three wires from the thermostat wires and write down which one you assign to be neg, pos and comm. Wire the new harness with 12vdc + input to the 12vdc + supply. Wire the 12vdc - and the thermostat - to the 12vdc - supply. Wire the 12vdc + (Therm) to the wire that you have selected to be the positive wire to your thermostat and then connect the communication wire to the wire that you have selected to be the comm wire. Now, install the new thermostat on the wall with the three wires pulled through the small oval hole at the top. There will be three blue block terminals with small regular slotted screws in them. Each one is appropriately marked +, -, comm. Attach each wire that you have chosen accordingly. Once everything is wired in and secured turn the power back on and you should have a readout on the LCD display. You may have to hold the + and mode buttons until you get a - - which will program the thermostat for degrees Celsius. Now set the fan mode to AU and then adjust your cool temp. If you turn the furnace on in the winter time and the ac fan starts blowing go back to your fan setting and change it to AU. If it is set to LO or HI the AC fan will come on when the furnace is turned on. Have Fun!

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1 Answer

Eden pure starts blowing hot air and then turns cold


I recently fixed this issue for a family member on this exact model, the same issue, it would heat fine for 15 minutes and then cold blowing air would follow afterwards non stop, and when we powered down the unit and restarted it, it did the same exact thing. ( What worked for me ) was ordering a new " Thermostat " which is a white rectangle looking plastic thing with 2 blue wires coming out of it, you can find You-Tube video's showing you how to remove the Eden-pure gen3 cover housing easily, my total cost of this do it yourself repair was just under $20 as of 10/10/14 your cost could vary depending on different factors.
1st...unplug the unit....duh ! lol
Once the housing is removed, look at the top of the unit and locate the 2 blue wires coming out near the front, remove the 2 top screws holding in the thermostat, gently pull out the old thermostat but don't disconnect any blue wires yet, put the new thermostat in facing the exact same way as the old one, re-tighten the 2 screws, next follow one blue wire ( One is longer than the other ) to its location on the block, determine if its the shorter or longer wire, disconnect just 1 wire with a Phillips screw driver, and replace it with the like sized blue wire from the new thermostat, tighten but not over tight ! next do the same for the next blue wire on block.
After thermostat is secure and wiring is secure, put the cover and panels back together......and plug it in and test it again....... Hope this works for you as it did for me.
Good Luck !

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1 Answer

I have a model 640 Reliance water heater. SN # A07A150454 M,F, 01/30/2007. About 3 months ago the water started getting cooler, then won't start. I turn the control up, then it starts, but the...


I believe 640 is typical tank-type atmospheric-vented gas water heater.
Gas water heater problems can get complicated. New heater sells for $350 at local box store.
http://waterheatertimer.org/How-to-install-gas-water-heater.html

If thermostat is not controlling temperature accurately, then (1) gas control needs replacement (2) water heater has sediment build-up (3) combustion and burner parts need cleaning. (4) All three things above, plus additional causes such as bad venting or not enough combustion air.

Usually recommended that plumber replace gas control valve thermostat:
See typical tank-type thermostats:
http://waterheatertimer.org/images/Typical-gas-valve-500.jpg
http://waterheatertimer.org/How-to-adjust-temperature-on-water-heater.html

Clean sediment out of tank:
http://waterheatertimer.org/Clean-sediment-out-of-water-heater.html

Clean combustion chamber and burner parts and troublehoot venting and air supply:
http://waterheatertimer.org/How-to-install-gas-water-heater.html#troubleshoot
http://waterheatertimer.org/images/Clean-burner-300.jpg
http://waterheatertimer.org/pdf/Bosch_Ventilating_tight_houses.pdf

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1 Answer

What type of fitting attaches engine oil cooler lines to left side of radiator on 1995 g20 full size chevy van


push connect fitting to take appart back up plastic retainer ring (looks like flat washer)
then ther is a nap wire clip that you can push in to release locking tabs if to dirty pull it
straight out (pick hook works fine or pliers if you cn reach
then pull line will twisting back and forth untill free
new line should come with new retainer washer and wire clip
installed wire clip first then push line on until it looks in installed retainer
start motor and check for leaks

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I have a Magic Chef beverage cooler, MCBC580DBT, it no longer cools, its a 2007, the power is on, the light and the thermostat work, the compressor does not turn on to cool. I replaced the ptc starter and...


same problem w mine and yes if you take the cover off the inside display you will be able to remove the board mine has a hole burnt in it.unplug harness w red blue and brown wires and jump and jump from brown to red unit will turn on you need a new board

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1 Answer

Swamp cooler starts up automatically after power outage


generally ther thermostat is the "brain" of the system, check the wiring diagram (if there is one) or the wiring and see if the on off swtch is inseries or parallell to the thermostat, (should usually be in series if it is I would say that the on off switch is the culprit. you cna verify with an ohmmeter to see if it is staying in the closed position.

Jul 18, 2009 | Heating & Cooling

1 Answer

Need a wiring diagram for mastercool evap 2 stage unit


I have the wiring diagram in the cooler. I can photograph and send it to you. Do you still need it?

May 12, 2009 | Heating & Cooling

2 Answers

Keg cooler dropping below freezing (DKC644BLS)


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