Heatpump r-22 rudd system,unit runs starts out heating then compressor stops in middle of heating ,this unit has a out side air temp. sensor just wondering if possible bad board or not

Heatpumps are more complex than an AC unit. Yes, there is a difference between a heatpump and an air conditioner. Where the real difference lies is out side in the condenser unit. There's a defrost board out in the unit, and depending on the brand and model, one of the wires will need to be changed so that the gas furnace will not come on. The problem with this, heatpumps use the heat that is available from the outdoors and transfers it to indoor. When the temps outside drop below 50 degrees, there's not enough latent heat to transfer, thus calling the propane furnace to operate. Without the addition of the furnace, you will not be able to heat the area properly. The only way to remedy this, is to remove the propane furnace and replace it with an electric airhandler with a heat strip for "emergency heat". The emergency heat term is used when the temps drop below the temps I mentioned above and calls for the heat strips to come on.

That's a complicated system that needs a qualified technician to service it. Lots of people can install them and they run fine, for a few years. Your indoor unit, operating on 2 heat elements, will feel like its blowing cold air even though its heating, just not so well. And not like you are accustomed to. Each element (5kw)=22.7amps, on average. So 3 elements operating should trip a breaker. Its probably been operating on 2 heat element plus the heat pump. And now you have trouble with the heat pump. If you can't TRUST the guys working on your equipment, try someone else. A second opinion. Normally a 3 or 4 ton unit will have 15kw heat installed, heatpump or not. 5 ton, 20kw. If yours is a 3-4ton, cooling, the 100amp(or normally two 60 amp) breaker should have been installed upon equipment change out. If yours is blowing cold all the time, something is wrong with your heatpump. The electric heat inside operates only when the heatpump can't keep up(real cold outside), the heatpump is in defrost(then it's actually in cooling mode), or if you have the tstat in aux/em. heat. Try a local trane dealer? Of a technician with 15-20 yrs under their belt. A trane dealer should have trane tech support also. BIG HELP!!!

If your home is 1300 square feet 1.5 tons is not going to cut it you should have at least 2.5 ton A/C unit. sounds like your system is to small. let me know if this helps you out.

I don't think the fan on it' own crates the problem. Could you find out what should be and what actually is the flow through it. If you needed <!-- MOJAIZBA.COM LINK CODE START --> <a href="http://mojaizba.com/convert-units-of-flow" title="Flow units converter page on mojaizba.com - Convert flow units online. Use the calculator for making conversions from one flow unit measure into another flow-volume amount between; acre foot per: acre-ft/day, hour acre-ft/hr, year acre-ft/yr, bar/day barrel Oil per day, hour bar/hr, minute bar/min, second bar/sec flow, cubic centimeter per day cm3 / day, hour cu cm/h, minute cm3/min, second cm3/sec flow, cubic foot feet per day ft3/d, hour ft3 / hr, minute ft3/min, second cuft/sec, cubic inch per day in3/day, hour in3 / hr, cubic inch per minute cu.in/min, in3/sec, cubed meter per day m3/day, hour cu m/h, minute m3/min, second m3 / sec, cubic yard per day yd3/day, hour cu yd / h, yd3 / min, cu-yd/sec, gallon US gal/day, gal/h, gal/min, gal/s, gallon UK per day gal/d, gal/hr, gal/minute, gal/sec, hundred cubic feet foot per day 100 cu-ft/day, 100-ft3/hr, hundred cubic foot per minute flow 100ft3/min, 100 cubed ft/sec, kilogram per day - Petrol kg/day, hour Gasoline kg/h, kg/min, kg/s, liter per day l/day, l/hr, l/min, l/sec, milliliter per day ml/d, ml/h, ml/min, ml/sec flow, ounce US per day oz/d, oz/h, oz/min, oz/s, ounce UK per day oz/day, oz/hr, ounces/min, oz/sec, pound per day - Petrol flow lb/day, Gasoline lb/hr, lb/min, lb/sec. USA – Imperial UK and Metric SI system units of flow. Buy the JavaScript JS and HTML code for this web flow converter tool application for your website." target="_blank">flow units converter</a> <!-- MOJAIZBA.COM LINK CODE END --> for a unit you'are comfortable with here is one we use if it's necessary. Let me know that...

yes go into electric heat for awhile. sometimes a heatpump will run constantlly when temps outside are not high enough./em heat mode untill temps rise or unit recovers.your unit should of gone into hot-gas defrost this maybe what your hearing. but remember electric heat is expensive to operate go back to your heatpump mode after system has a chance to recover.

Your outside unit is not defrosting. You need to call a service tech to check it out. Defrost board sensor or low on gas. Also you amy have an outside tstat that is not working correctly. Rus

Flush the system with Nitrogen. Then R-11. Then install low side and high side filter driers. Then replace the low side filter drier after 2 weeks running time.

If the outdoor unit is in defrost mode the compressor will be running but the outdoor fan will not. You may even see some steam rising from the coils. This mode is to prevent frost or ice build up on the outdoor coil. Essentially it goes into cooling mode w/o the outdoor fan running.

If the compressor never kicks in, I would check the start capacitor, thermostat and the compressor windings. Most times the start capacitor is defective. Some window air conditioners the fan will run while the compressor stop through the thermostat switch. If the thermostat switch is bad every thing runs except the compressor. Let me know, Thanks, Sea Breeze

If your Heatpump's fan isn't running but your compressor is, your fan motor is out. If nothings happening at all ensure your getting power to heatpump (ex: breaker tripped, fuses blown on outside power switch, or fuses blown in breaker box?)