Why doesn't the compressor start in the heat mode

Hi,
The red light indicates it's either heating or in defrost mode
Check the outdoor unit if the compressor is running - the large pipe on the outdoor unit should be hot on heating or cool to touch on cooling
When in heating mode - the indoor fan will not start until the indoor coil is warm enough
If the reversing valve that changes from heating to cooling is faulty then you may encounter the same symptoms too
Probably need a Refrig Tech to have a look at it?
Good luck

Jan 07, 2016 • Sanyo 24KS72 Split System Air Conditioner

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New ct31a, wired per instructions will not work. Putting R+G+W together will start AC, but will not start heat. what am I doing wrong?

Make sure the batteries are in correct and also make sure it is perfectly level. If those are not the problems then you have a faulty unit.

Oct 04, 2014 • Honeywell Ct31a Heating & Cooling House...

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Why doesn't the compressor start in the heat mode

If the compressor is off and the heat coil is on - this is normal for the "E" or emergency heat setting. Check for proper connections between the Heat-pump, furnace(heat source) and the thermostat and that the thermostat is capable of controlling a heat-pump with secondary/emergency heat units. Thermostats designed for this have 4 settings: Cool / off / heat / E(emergency heat). in the "heat" setting, both the Heat-pump and Aux heat work together to maintain temperature. In the "E" setting, only the Aux heat source is used. The "E" setting should only be used in extreme cold - when the Heat-pump can no longer produce heat.

Sep 10, 2014 • LG LP153HD3A - 14,300 BTU, R410A, 9.4 EER,...

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Any body tell me what is the problem with my 1.5 Dawlance split ac It gives perfect cooling in night and morning but in afternoon its compressor turn on and off every after 15 minutes. And due to this my...

when the heat ambient temps go up . the start capacitor gets hot to turn on fan and heat sensor for the compressor senses it and turns off . check the run/start cap first

May 25, 2014 • Haier 18000 Btu Air Conditioner Heat Pump...

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2answers

Split AC whole unit turnig off at each compressor start up!

Dirty coil wash outside unit with water and change indoor unit filter

Jun 08, 2017 • Heating & Cooling

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1answer

Delonghi CP504AU Split Inverter AC system. When on heating mode, indoor fan is supposed to shut off during defrosting of external coil, but doesn't. It continues to run all the time, blowing cold air until...

Hello I think it is a faulty defrost interlock or should at least bring on 1st stage electric heat during defrost mode.

Sep 14, 2010 • DeLonghi Heating & Cooling

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1answer

AC draws more current in hot mode

If this is aheat pump or reverse cycle unit that amps in heating is to high. Should not go over nameplate amps in heat or cool. Sounds like maybe two things. Overcharge and stopped up coil on the inside air handler. The reason for the high amps is in heat the head pressure is higher than normal. So check the coil inside and have the charge checked because that compressor wont run long pulling that much amps over nameplate. Keep in touvh Rus.

Nov 25, 2009 • Ruud Matching Split Air Conditioner

Question 2

Nathan Shaffer

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Posted on Apr 09, 2015

Nathan Shaffer

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Is it a heat pump? Is it a heat pump stat? Is ambient temp high enough to allow heat pump to run?

Answer 2

kilr69

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Posted on Apr 09, 2015

kilr69

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If heat pump, ohm out outdoor ambient air sensor.

Answer 3

akersken

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Posted on Oct 18, 2014

akersken

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Check and make sure the thermostat is programmed to bring on the heat pump before the emergency heat.

1 more comment
kilr69 Oct 18, 2014

Heat pump. When call for heat is more then two degrees higher than indoor temp strips will kick in but if no outdoor unit there may be a problem with wiring at indoor unit or outdoor unit. If older than one year not under warranty. Look up manufacture an call 800 tech service number
kilr69 Oct 18, 2014

Could also have leak and out on low pressure sensor. Look for signs of oil. Have crescent wrench in hand. Or call install company
kilr69 Oct 24, 2014

open panel on outdoor unui, see if contactor is pulled in in either heat or cool mode. press with insulated instriment on contactor and see if unit starts. if so it is a wiring issue.if it worked before there is a 24v issue either in the air handler, thermostat, outdoor unit. Best guess is the thermostat.

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Why doesn't the compressor start in the heat mode

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akersken

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I have a Dometic 630315 duotherm penguin roof ac in my 20year old rv. The ac comes on, fan blows but compressor tries to engage but shuts off after about 1 to 2 seconds.

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Why doesn't the compressor start in the heat mode

3 Answers

Nathan Shaffer

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akersken

Add Your Answer

Attachments: Added items

Related Questions:

I have a Dometic 630315 duotherm penguin roof ac in my 20year old rv. The ac comes on, fan blows but compressor tries to engage but shuts off after about 1 to 2 seconds.

My portable Danby doesn't cool, everything is working fine but when i put it in AC mode I can hear the compressor trying to start but no cool air. The compressor try to start every 5/10mn but fail

Electrolux split A.C. display F6 error and trips immediately after starting the compressor.

Why does my sanyo model KHS2472 has a red light blinking in heat mode and a green in cooling mode, does not work in either mode makes a gurgling sound when it tries to run?

New ct31a, wired per instructions will not work. Putting R+G+W together will start AC, but will not start heat. what am I doing wrong?

Why doesn't the compressor start in the heat mode

Any body tell me what is the problem with my 1.5 Dawlance split ac It gives perfect cooling in night and morning but in afternoon its compressor turn on and off every after 15 minutes. And due to this my...

Split AC whole unit turnig off at each compressor start up!

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LP153HD3A - 14,300 BTU, R410A, 9.4 EER, Heat PumpPTAC, 230V

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