Question about Mastercool 67680 Evaporative Cooler Air Conditioner

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Motor cycles on and off. It is a roof top unit don't know how old. this is a rental house with an absent landlord. don't want to and cant spen much money on fixing but don't want to burn it up.

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  • rnnana Jun 16, 2008

    it is irregular and there is no thermostat. this rental was really trashed and i have no idea how long, if ever, the cooler has been serviced. temperatures are in the 100 to 110 range with low humidity


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Is this on and off cycle rapid and irregular? If so it may be loose control wiring or a bad thermostat.

If the Cycle is not rapid it may simply be trying to satisfy a heavy heat load.

Posted on Jun 16, 2008

  • Don Berry Jun 16, 2008

    The first thing to do is to turn the unit off at the breaker and find the thermostat. Maybe the tenants broke it off the wall or something. If you can not find the thermostat than it is time to call in a contractor. It may have been broken off the wall, stolen or something.


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Renting and Paying the Gas Bill

This past week I changed out an old hot air furnace in a rental unit that made me question why the tenant did not go to the owner and offer to pay more rent in exchange for getting the furnace changed out sooner. If you are a renter that is paying the gas bill, then you need to think about this.
The hot air furnace was at least 60 years old. It had been coal fired furnace that was converted to gas many decades ago. The pilot light of this beast was more of a torch than a pilot light. When the thermostat called for heat the flame roared for 15 minutes before the exterior blower unit that was added when the furnace was converted to gas, started up to move air through the furnace and into the house.

As I was starting up the new unit, which took up less than 1/3 of the space of the old beast, the renter came and sat down on the basement steps looking on in amazement. How would that little thing make enough heat for the house? A few minutes later those questions were put to rest very quickly.

After starting the new furnace and burning off the oil that always smokes up the house a bit on a new startup the new little unit had the house warm as toast and was shutting down. Wow, that took less time than the old beast took to just warm up!

The renter related to me how that the old furnace cost over one hundred dollars a month just to run the pilot over the summer months. The wintertime heating bills were many times higher than that. The difference between the bills of the old unit and the bills that will be coming now will be unbelievable. A savings of 40-50% is not at all out of the question.

Now, if you are renting and are paying the bill to feed an old monster of a heating system, I suggest that you make a proposal to your landlord. Offer to pay a bit more rent in exchange for a new heating system. Not only will you decrease your gas bills enough to pay some extra rent and still come out ahead, but you will have the peace of mind that you have a safer heating system under the roof that you also live under.

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House fuse box very old. Need to find out which fuses need to be replaced.

no, you certainly would not like to dance with that partner. Just go ahead and let your neighbors know you have to do some electrical repairs. A real safety concern, shut off what has to be shut off. Tell your landlord to go ...what is he? awful?

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Elderly tenant unable to use oven as they don't know how to turn it on. elements work ok as new so what is the trick. manual not avl from owner of rental house

You have not mentioned the make model of the oven, whether it is gas or electric.
Please check for gas line, gas valve, gas regulator to open and ignite.
If electric make sure there is power at the outlet, if the circuit has tripped, check mains.
Please consult your landlord before you pull out any units as he could be the best help.

Nov 16, 2010 | Ovens

1 Answer


well the land lord is responsible to repair or replace a unit(appliance) that is offered in the rental agreement ,,this is his problem assuming that you did not abuse your machine IE kids taking a ride in it, filling the washer to the point the lid dos not close and so on lol i`m certain you are innocent of this,,,,,,,Right ?
at any rate coordinate your efforts to repair your unit with your landlord, i`m certain that any good landlord will be reluctant but obliged to have this situation ratified landlord ,,,,,your fault is most likly with the lid switch it is a safety feature built into all washing mashines to prevent the spining action to ocer with the lid oppen this is to provide a prevention to personal phisical injeries

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My roof top a/c unit is as old as nails. the fan blows but not the the A/C. i live in a rental apt. my landlord wont repair or fix it. what do you suggest i check for? thank you

hate to say it,but they dont have to fix it,remind him next time when you have to shell out the same amt rent for less creature comfort,till then go towalmart/shopko what have you and when you plug it in hope his electrical service is more up to par than his rooftop and can handle your new a/c.good luck!!!

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