Question about Heating & Cooling

2 Answers

Why would my heat pump central air blow cold then warm

Why would my heat pump central air blow cold then just start blowing warm on later afternoons when temps around 90 degrees f? I should add, that when we turn on the heat, it doesn't turn off when the set temp is reached. We have to turn it off manually. This is a used unit (not too old), recently installed by our landlord's friends, who install ac, but don't work on them.
Lennox Elite Series
outside unit M/N 10HPB30-9P
inside unit M/N CB29M-31-1P

Posted by on

Ad

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Master:

    An expert who has achieved Level 3.

  • Master
  • 277 Answers

The unit not turning off in heating mode sounds like a problem with the thermostat or the wiring to it. The other part really needs more information. Does the unit just stop cooling, or does it go into heating mode? If you turn it off for awhile, does it start cooling again when you turn it back on? Are you able to see the condensate water that comes off of it? If so does a lot come out after it has been turned off for a while? Is your filter clean? There are various things that could be wrong. If it is an old Lennox, they were full of problems, but the newer ones are much better. The biggest problem may be that it was installed by someone who can't work on it.

Posted on Jun 09, 2017

Ad
  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Heating & Co... Master
  • 1,447 Answers

Sounds to me like you have wiring issues. Need to make sure all your connections are tight, wires are clean and free of bare spots (possibly from rodents chewing them)and your settings on your tstat are correct. Heat pump with back up electric heat.

Posted on Jun 09, 2017

Ad

5 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

  • 127 Answers

SOURCE: ac not blowing cold after outside temp reaches 98 degrees

Sounds like you have dirty condenser coils. Remove the upper shroud and check the condenser for clean. Take a water hose and gently spray out the coils paying special attention not to bend the coils over with too much pressure. This will allow more air movement through the coils and give you better cooling efficiency.

Hope this helps,

Jeff

Posted on Jun 29, 2009

  • 1 Answer

SOURCE: AC unit runs inside but not outside! help

check your thermostat is it set on cooling, check your pressure switch it might be triped due to blocked condenser.

Posted on Jun 30, 2009

redgs95
  • 15 Answers

SOURCE: unit not blowing cold air

you have a slow leak in your refrigerant and need to find the leak. you will have to get an AC repairman to come to your house and check it for leaks and fix the problem.

Posted on Jul 28, 2009

  • 9 Answers

SOURCE: water is leaking into my garage when A/C unit is r...

Check your indoor unit. your problem is there. you will be able to see where the leak is coming from then I would be able to help you more

Posted on May 22, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Problem heating up and staying heated.


the heater has went out of it or something is keeping it from trying to get it to warm up

Feb 08, 2014 | 1997 Oldsmobile Bravada

1 Answer

The blower starts before its warm and it blows cold air for about 30 sec when its shutting down .


When any unit 1st come's on, you'll always have some cold air that's in the ducts that will blow out before you get warm air. If your duct work is uninsulated in a cold basement or crawl space then it will be even more noticeable. When the unit is heating from the Heat Pump mode, it takes a little longer for the gases to get warm enough so you'll fell heat. When it gets cold enough for the unit to switch from heat pump to the gas or electric heat source, you'll get warm air faster. If you have gas heat, some Thermostats have an anticipator setting for the gas valve. If it's set wrong it will effect the on/off cycle of the gas valve.
All duct work in non heated and a/c spaces, including inside walls,above dropped ceilings, in attics and crawl spaces, must be sealed & taped at the seams and joints and then insulated and taped.
Most new construction has solved that problem with insulated duct board, flexible insulated supply's and special tape.

Dec 12, 2013 | Rheem 13PJL30A01-RHLLHM3617JA 2.5 Ton 14...

1 Answer

Heat Pump - blows heat to set temp, then off, then kicks on to blow cold


Heat pumps defrost which is the AC mode, if the heat strip isnt working during a defrost, the air will be cold, A heat pump only feels warm if the heat strips are on too! the refrigeration cycles heat output is much less sensible to our 98F skin. heat pumps that satisfy a room setpoint are working at least, all heat pumps feel drafty to most.

Oct 28, 2012 | Honeywell Programmable Thermostat Heater

1 Answer

I just put in this new thermostat, I believe all the wiring to be correct i have one extra wire (brown) that should be a common wire used to keep the display lit. when I turn the unit on cool ( with the...


Heat pumps require specific heat pump thermostat. If you are trying to install a thermostat that is generic forget it. A heat pump is a diff animal than a central unit. Get the thermostat that matches your system. A generic won't cut it.

Aug 13, 2011 | Heating & Cooling

1 Answer

The heater will not blow warm air until you start driving. The fan blows but its cold air. Once you start driving the air turns warm. Why?


There may not be enough coolant in the system. What happends is the heating core is nothing more than a small radiator inside the car. If the fluid is low the heating core is empty. But once you start driving the water pump works harder and fills it up. Another possible cause is a sticking thermostat. If its stuck open the engine cant retain water to heat it up. Thus blowing cold air. Whith the engine cold remove the radiator cap and check your coolant level. If it is full a replacement thermostat may be needed. HTH and dont forget to rate.

Dec 06, 2010 | 2003 Dodge Stratus

2 Answers

My heat unit will not blow hot air unless we go outside and hit a button on the back bottom of the unit. Once we do that it will blow hot air for that cycle. when it is time for it to come on it is cold...


If it does not have a furnace or heating elements for heating, then it is a heat pump, which is rare for a central AC system, but makes sense of the fact that it blows warm air when you reset the pressure switch, which may indicates freon pressure charge problem if your AC system has a reverse valve and uses freon to for heating (heat Pump).

Do you get heating when outside unit runs? if you do, check freon pressure levels and top up to required pressures. The button you depress is a pressure reset switch ... that is if your AC system is a heat pump ... which, as pointed above, it is not common for central ACs.

Nov 07, 2009 | Ruud Central System Air Conditioner

2 Answers

AC unit outside blowing out cold air, vents


Sounds like compressor not running. may be a bad capacitor, could also be low on freon.

Aug 30, 2009 | Goodman CLJ30AR32 Air Conditioner

Not finding what you are looking for?
Heating & Cooling Logo

Related Topics:

112 people viewed this question

Ask a Question

Usually answered in minutes!

Top Heating & Cooling Experts

Paul Carew

Level 3 Expert

2597 Answers

Dan Webster
Dan Webster

Level 3 Expert

8220 Answers

Donni Steen

Level 3 Expert

659 Answers

Are you a Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...