Heat Pump Not building enough heat to shut off & coil cool


Old 01-01-14, 07:43 AM
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Heat Pump Runs Continuous

Coleman Outside # DRHQ0421CD R22
Inside Coil Mortex # 96-8W48-0P
Thermostat inside Honeywell RTH 7600
OK, here is my dilemma,
Out side unit is blowing cool in heat mode & system runs continuous Coil is cool to touch
Problems started when old coil went out, was due to leak
Neighbor jump wired thermostat to make aux & e heat to work & outside unit was disconnected Power shut off
New Mortex coil was installed by HVAC tech (Pipes brazed, discharged, vacuumed lines)
R22 in at outside unit (4 lbs )
installer recommended new thermostat & installed
All looked good & seemed to work fine at this point, but is was warm 50+ daytime 40+ night
Now that night time has dropped to 25+/- seems like system is working way to hard, not much heat coming from outside unit & coil is cool
We have fireplace it keeps thermostat temp up around 74/76 but when fire dies down & thermostat set at 69, system runs all night, aux heat kicks in & out & I put system on em heat temporary & it worked & built up heat enough to cut system off But came back on quick (It is 29 degrees outside)
HVAC installer (Out of town for 2 weeks) thinks orifice in coil might have blockage, but I am thinking it may be a wiring connection problem
Wiring looks right except for green wire coming from outside thermostat unit is not hooked up anywhere, green wire from inside thermostat unit is hooked to dark green at blower/furnace
Heat worked fine with aux heat only, but electric bill reflected
Heat worked fine also until original coil leaked
Any input appreciated

Last edited by Smoke1951; 01-01-14 at 08:05 AM. Reason: More Info
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Old 01-01-14, 09:14 AM
Houston204's Avatar
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Sounds like a refrigerant restriction or a refrigerant leak. This does not sound like a wiring problem. I recommend waiting on your tech or calling another company.

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