We used the AC on only two days during the summer and everything seemed to work fine. TXV or EXV. Traditionally, in-floor radiant heat (electric mats) will DOUBLE or even TRIPLE the cost of tile install. many techs have seen it and they all recommend different things like board is bad, metering device on the heat pump is blocked, pressure to high etc etc.. Pressure too high … Why are you questioning the install? Heat pump running constantly. Re-setting the system and putting in new filters seemed to have helped. Elmer, the install was done by a licensed HVAC sub contractor but the question on being "qualified" is very subjective. Geothermal is expensive (my average cost is $45K to $70k all in) so I think you need to consider that. This may be caused by a loss of water flow in the cooling mode or low airflow in the heating mode caused by a dirty filter. This time, it didn't even reach 50 degrees Fahrenheit outdoors all day long. Changed the filters in the main unit and just found the coil. Is the coil a Goodman coil? I guess I have to take apart the unit to see. A bad check valve on an air conditioner, heat pump or similar HVACR equipment can show up as abnormally low or abnormally high suction line pressures, or as abnormally low or high superheat. on the refrigerant line at the condenser (look for "fluttering" pressure on the suction side). I think 1.03 SP is high. In the manual at troubleshooting there are some possibilities for HP lockout in heating mode: Lack of flow through hydronic heat exchanger, High fluid temp. I used to own one of those systems. But unless an airflow alarm is present, you are going ot get airflow, but if the coil is dirty, or filter dryer or outdoor TXV is plugged, you can get highs pressure. On heat pumps the indoor coil becomes the condenser in the wintertime and if you are not getting enough airflow across the indoor coil it with cause the high-pressure code problem. Horizontal right installation with coil on the blower (upstream).Systems is few months old and goes into high pressure lockout (code L2) on the heat pump. What to Ask When Considering Heated Floors, Clean-Burning Woodstoves Ignite a Greener Heating Trend, 5 Steps to Improve Your Heating System Now, 7308 KWH used in one month -seems extremely high, New 110 cfm Bathroom ceiling fan that does not do the job, Help needed with stain on ceiling near air vent. If your heat pump is in good condition, it may take between 24-72 hours to heat an average-size pool about 20 degrees. These are well liked by tile installers and electricians alike because of their ease of install and their reliability. Surprised you don’t have a warning for that. "Is this the cause of the lockout issue ?". BUT in the coil manual they say put the coil downstream of air handler... exactly opposite. Do you have any problems in cool mode? 1.03 is very high. Hence the issue and questions. Good luck. The unit displayed a high pressure lockout fault, so I went ahead and cleaned the filter as we have had a ton of pollen lately and I knew flow was crucial for the heat pump operation. currently its Horizontal right, return > Air blower > Coil > Supply. In heat mode, the indoor coil becomes the condenser and that is where the high pressure (gas to liquid) exists. On Christmas, before we got the water flowing to the unit again (and were using the emergency strips), we had to turn up the heat because guests were coming over and it was 315 kWh for that day alone. Were you running heating or cooling when it tripped? This would eliminate "stand by" heating costs while you are not at cottage. We had propane shortages but using "high efficiency" you can limit purchases to off season, best price/availability are June to August. As you might imagine, heat pump operation in cold weather is not the best, which is why they are typically only used in temperate climates...think beaches, palm trees, and oranges. Furthermore, it is killing the unit as it should avoid damaging the compressor or other components in the refrigeration loop of the heat pump. In heat mode, a dirty outdoor coil can cause a low suction pressure. Compressor kicks on and runs for 3-4 minutes and the high pressure trips. Was it done by a qualified and licensed professional? And that gets EXPENSIVE very, very, very quickly. High Pressure When this light is on, it indicates high refrigerant pressure. To take apart the unit to see would eliminate `` stand by '' costs. Ranges that occur with the lack of heat putting in new filters seemed work.: //warehouse25.com/, my contact was Alex only if the groung loop flow is throttling that always. 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