Jeff_Bathroom
Member
Odd that I'm having to post this so soon after my last incident.
My wife and I noticed that despite the temperature displayed on the thermostat,
the house did not feel as cold as usual. The return is located near the floor, so I also
noticed that when I walk by, the carpet next to the return felt very cold. Neither of us
remember ever noticing a cold carpet there.
So, I got a couple of cooking thermostats and placed them next to the wall thermostat.
The a/c temp was set for 73 and the house thermostat was showing that temperature. But,
the cooking thermometers and our bodies told us that the temperature was really between
75 to 77. I checked the little manual that came with the thermostat and noticed that it had
batteries in it. I never knew that til now. It's supposed to be for when the power goes out.
But of course if the power goes out, you have no a/c anyway. But, I replaced the batteries
and reinstalled the unit onto the wall. Then the temperature registered 77, matching the
cooking thermometers more or less.
So, I thought that was neat and went on to set the temp to 73 and I let it run awhile.
Then I noticed the coldness on the carpet again. It seems what is happening is that the fan
that is set to auto is shutting off sooner than it normally should. Then the cool air being produced
up in the attic is just naturally falling downward and leaking out of the inflow vent. I had noticed
that before when the carpet was cold. I could hear the air handler in the attic and put a piece of
paper onto the vent and it fell to the floor. So, I then set the fan to continuous ON to see how it behaves.
The house actually feels cool like it should. My bare feet are cold right now which is how it should
be if I have the a/c set to 73. However, now the thermostat shows a temperature of 70 and my
food thermometer shows 72 to 73. So, now the thermostat seems off by three degrees downward
instead of off by three or four degrees upward as it was before replacing the batteries.
Think I just have a bad thermostat? Would a bad thermostat also account for the "auto fan" maybe
not working properly?
My wife and I noticed that despite the temperature displayed on the thermostat,
the house did not feel as cold as usual. The return is located near the floor, so I also
noticed that when I walk by, the carpet next to the return felt very cold. Neither of us
remember ever noticing a cold carpet there.
So, I got a couple of cooking thermostats and placed them next to the wall thermostat.
The a/c temp was set for 73 and the house thermostat was showing that temperature. But,
the cooking thermometers and our bodies told us that the temperature was really between
75 to 77. I checked the little manual that came with the thermostat and noticed that it had
batteries in it. I never knew that til now. It's supposed to be for when the power goes out.
But of course if the power goes out, you have no a/c anyway. But, I replaced the batteries
and reinstalled the unit onto the wall. Then the temperature registered 77, matching the
cooking thermometers more or less.
So, I thought that was neat and went on to set the temp to 73 and I let it run awhile.
Then I noticed the coldness on the carpet again. It seems what is happening is that the fan
that is set to auto is shutting off sooner than it normally should. Then the cool air being produced
up in the attic is just naturally falling downward and leaking out of the inflow vent. I had noticed
that before when the carpet was cold. I could hear the air handler in the attic and put a piece of
paper onto the vent and it fell to the floor. So, I then set the fan to continuous ON to see how it behaves.
The house actually feels cool like it should. My bare feet are cold right now which is how it should
be if I have the a/c set to 73. However, now the thermostat shows a temperature of 70 and my
food thermometer shows 72 to 73. So, now the thermostat seems off by three degrees downward
instead of off by three or four degrees upward as it was before replacing the batteries.
Think I just have a bad thermostat? Would a bad thermostat also account for the "auto fan" maybe
not working properly?