Question about Mastercool 67471 Evaporative Cooler Air Conditioner

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Heating (Vulcan) & Cooling (Bonnaire) are wired together , but the cooling is not switching over when you change the Mode on the control panel

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Need to assess if the unit is functioning. most likley a problem in the unit not the controler

Posted on Apr 04, 2011

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Posted on Jan 02, 2017

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Mum's Vulcan oil heater was serviced.Filter changed. Always hasn't burned all the way to the ends it's standard 1 control knob. Is there a oil/air mix adjustment. Can't find online manual anywhere.


Probably needs burner pot cleaned out, common thing to do.
Its a 40 series oil heater, only had single knob, air adjust is automatically set by internal controls.
where abouts are you.
I have some parts and manuals still

Jul 03, 2017 | Vulcan Heating & Cooling

1 Answer

Bonaire Vulcan controller cct board 10 amp fuse keeps blowing


Obviously a direct short. Take pic, remove all wires, replace fuse. Wire by wire, turning power back on each time until fuse pops. When it does, there's your problem.

Jun 02, 2017 | Vulcan Heating & Cooling

1 Answer

Heat pump heats with ac cool mode on dometic rv rooftop.


Sound like the change-over valve on the heatpump is not switching. Could be the valve is stuck, or bad. Or the thermostat is bad and will not send voltage, or is sending voltage to your change-over valve.

(Some systems energize the CO valve to cool, while others de-energize the valve).

Usually the color coding for the thermostat wires on a heatpump are orange and yellow. The yellow wire usually energizes the compressor contactor, and the orange wire energizes the changeover valve. Now depending on what your system does in terms of energizing or not energizing the CO valve to invoke heating or cooling mode is not known. You can try jumping across the thermostat to see if the CO valve is working. Or you can even try placing the stat in heating mode and see if you hear that loud "Woosh" when you switch between heating and cooling modes at the stat.

What often happens is the cylinder inside the CO valve gets stuck, especially if the system has sat off for an extended time. By workign the stat from heating to cooling (reversing the porting on the CO valve) will cause the valve to free itself up.

If you cannot hear that woosh as the changeover valve switches between heat and cooling, it is possible the CO valve is bad, or there is an issue in the electrical or control side of your system. Such as a bad base or switching circuit in your stat, or control issues other places.

Sep 03, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

How many amps do these unit draw


There are TWO different models of Mach III.


A/C cooling only model
  • Amps Cooling 14.9

A/C cooling WITH HEATING

  • Amps Cooling 14.9
  • Amps Heating 16

Just check the control panel and see does it has the heating option.

If you're not sure then please ADD the exact model of THIS comment page.

I will follow up on it later.







Jul 23, 2009 | Coleman Mach III Air Conditioner

1 Answer

Vulcan-Bonaire : summer breeze


This unit is a cooling unit only. I don't know what switch you are looking at but I don't think it's for the evap. cooler(swamp cooler). I am in the Phoenix, Arizona area and it's very common to have a evap. cooler and a seperate heat/cool system as on the hottest days the evap. cooler doesn't cool enough. I hope this helps. Please give me a positive rating. Thank you.

Jan 27, 2009 | Mastercool 67471 Evaporative Cooler Air...

1 Answer

Control panel lights constantly flashing


You should have a dedicated line that feeds the equipment power look at your main electrical panel or search around your equipment for a pull out disconnect switch or sometimes they will wire it to a light switch. by shutting down the main power and turning it back on it should reset anything.

Jan 04, 2009 | Mastercool 67471 Evaporative Cooler Air...

1 Answer

Mitsubish mr Slim air contioner heat & cooling control panel


HOW TO WORK THE HEATING AND COOLING CONTROL PANEL
- PRESS THE SWITCH ONCE IT OPERATES "COOL"
- PRESS THE SWITCH AGAIN IT OPERATES "HEAT"
- PRESS THE SWITCH ONCE AGAIN IT STOPS.
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Mar 05, 2008 | Mitsubishi Mr. Slim MXZ30TN Air...

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