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Very louse noise from Day&night central heater

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Make sure your filter is clean and that the blower assymbly is clean. If the torque is to high, you will get noise that can be rather annoying.

Posted on Jan 05, 2009

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Central heating&cooling

sounds like your compressor is getting hot and shutting down have you washed your outside condenser coil? Could be dirty causeing high head pressure and shuts your compressor down. Try washing your condenser coil I think this will help you. If not you may be low on charge of Freon.

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Nodyne heater relay making buzzing noise

relay needs to be changed. you could probably tap on it & it would quit..

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My new Fedders window air conditioner makes clicking noise all night long. HELP!

Has it done it since day one? Does it sound like the kind of noise you might get by flicking drops of water into a fan? If so that noise is normal for many newer air conditioners. Sorry.

Aug 09, 2012 | Heating & Cooling

1 Answer

Everyday the central air unit keeps our house at a comfortable 73 degrees. Every evening, despite the thermostat setting of 72, the house heats up to 77-79. What's the problem?

Is the sun hitting the t-stat during the day? If its a programmable unit check the programming, perhaps its set for energy sving at night

Jun 21, 2011 | Heating & Cooling

1 Answer

I have an older Day & Night / Bryant / Carrier downdraft central heater. It was a heat only unit but has an aftermarket AC unit added onto it. I have the latest PCB that adds the AC cooling feature...

4 wire will not work properly.

You will need a 5 wire minimum.

Blue = common
green = blower fan
red = hot
white = furnace
yellow =AC

The wire from the thermostat to the airhandler would be like above.
The wire from the thermostat to the AC (via the airhandler) would be blue and yellow.

Aug 30, 2009 | Heating & Cooling

1 Answer

My central air pooched last night.... I am hot and miserable... LOL but anyways... the outside unit makes a noise when I turn it on but the FAN does not spin at all.... any idea what it might be?

depending where the noise is coming from. If you can be next to the unit as it starts see if the noise is coming from the fan or control panel (where the electric is going into) and how loud is it. I would venture to say that it is probably the fan motor, you will hear it if you are there.

Jun 17, 2009 | Carrier Heating & Cooling

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Slimline storage heaters with no switch to turn on/off - how do you turn them on? have taken off the front panel but can see no switch/override - the electric cable comes straight from the wall into the...

The principle of electric storage heaters is that they take in electricity at night through a central time switch (normally owned by the electricity supply company and usually not controllable by the user).

There should then be a main switch/ fuse box to control the heater circiuts, check for such a box and that it is switched on (This would normally be sited near the electricity meter).

There should be an isolator switch next to each heater but from what you say this is not the case.

There should be some controls on each storage heater marked INPUT with a dial from 1 to 6 or similar then another marked OUTPUT or BOOST.

When you have ascertained the fuse box is on and the heater controls are set to maximum you then have to wait overnight for the heaters to warm up.

Oct 09, 2008 | Heating & Cooling

1 Answer

Centralized gas heater


Pls check the following,

1) Check the NamePlate of the units base to input Power supply voltage (when the voltage is low your unit hard to start its so hear sound noise before to start).
2) Check the wiring connection if this is inverted.
3) Check the connector wire to Compressor/F.m.may be loose.

If this not solve go to the nearest repair shop to check the compressor if this is internal problem.

Thanks & best regards,


Jan 18, 2008 | Carrier XHB123D X/Y Series Heat/Cool Air...

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