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The display on my central A/C thermostat went blank and air wouldn't come on. The circuit brekaer is fine. This happened 2 days ago, but came back on after about 2 hours. It ran fine yesterday until about 7pm and then came back on about 10pm. Today, it was running fine until about 2pm and has been off (blank) ever since.
I figured it out...can't believe how simple it was. There's a safety switch installed on the drain pipe coming out of my HVAC unit (mine's in a utility closet...some are in the garage). When the drain pipe gets clogged, it makes the water backup and a little bobber in the safety switch floats up and kills the thermostat. I disassembled it to test this and...viola. Interesting that it totally kills the thermostat instead of just turning off the air/heat. Anyway...I shop-vacced the water out and bought some tablets and threw them in the there to clean out the clog - hopefully that will help the flow (I've heard you can use bleach too).I figured it out...can't believe how simple it was. There's a safety switch installed on the drain pipe coming out of my HVAC unit (mine's in a utility closet...some are in the garage). When the drain pipe gets clogged, it makes the water backup and a little bobber in the safety switch floats up and kills the thermostat. I disassembled it to test this and...viola. Interesting that it totally kills the thermostat instead of just turning off the air/heat. Anyway...I shop-vacced the water out and bought some tablets and threw them in the there to clean out the clog - hopefully that will help the flow (I've heard you can use bleach too).
Many AC units use a condensate safety switch that kills the power to the thermostat if the water gets backed up, especially if installed in a closet or attic. Best thing is too clean the line every sixth monthes.Many AC units use a condensate safety switch that kills the power to the thermostat if the water gets backed up, especially if installed in a closet or attic. Best thing is too clean the line every sixth monthes.
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Coincidences do happen - your ride-on mower was probably one of those but the pattern of electrical problems you have experienced lately does suggest a common fault with your supply.
Could be your house is receiving power surges and maybe you haven't enough surge protection. Perhaps your system ground isn't very good.
One woman that posted here a few months ago was wondering why certain electronics kept breaking. It turned out a gas pipe wasn't grounded and gas flowing through the pipe caused a static electricity charge to build in the pipe until it jumped to whatever was nearby.
You need to consider almost everything these days contains a computer of some sort and so breaks much easier than older appliances, though in fairness appliances today do have a built-in limited life.
it's the control panel behind that touchpad item. and it's not too difficult, just time consuming. My recommend is to grab a service manual online(usually around 20.00) which will provide good step by step,and also parts list.
spares? well, that's a good question. Until you have that part number, and the best way is to eyeball the one that's in side your unit(no offense to the printers, but mistakes can happen with manuals).
then you'll find out what it's like to be truly handy, eh?
Put new batteries in the thermostat. Make sure that the switch that power the furnace is in the "on" position. Sometimes people mistake that switch for a light switch and turn it off.
Running the equipment on 72 degrees would cause the compressor and fan to work harder on hot days. This will definitely place more strain on your capacitor. These capacitor problems usually happen on the hottest days. I would suspect the capacitor, not the fan. I'm an HVAC tech, so I would Check both with my multimeter
First ,you should verify thermostat has good batteries.secondly ,you should check to make sure the circuit breaker isn't tripped. If both of these give no results and you feel comfortable digging around the unit yourself, you will have to access the sevice panel on the outside unit to verify voltage from transformer. You should check the secondary side of transformer for 24 volt ac, as this is what feeds power to your thermostat . Hope this helps
Couple of things to check, most AHU Air handing units will have a 3 to 5 amp fuse in them check that first to see if you control circuit fuse is blown, if not you have lost the 24 volts from your transformer in the AHU.
I figured it out...can't believe how simple it was. There's a safety switch installed on the drain pipe coming out of my HVAC unit (mine's in a utility closet...some are in the garage). When the drain pipe gets clogged, it makes the water backup and a little bobber in the safety switch floats up and kills the thermostat. I disassembled it to test this and...viola. Interesting that it totally kills the thermostat instead of just turning off the air/heat. Anyway...I shop-vacced the water out and bought some tablets and threw them in the there to clean out the clog - hopefully that will help the flow (I've heard you can use bleach too).
Many AC units use a condensate safety switch that kills the power to the thermostat if the water gets backed up, especially if installed in a closet or attic. Best thing is too clean the line every sixth monthes.
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