Our a/c-heat pump unit was replaced for our home. This unit throws hot air in the summer and cold air during the winter. We have called service techs numerous times and no one seems to find the issue. Currently we set the temp@ 76 degrees a/c and it says it's 85 degrees inside and blowing hot air. Please give me any suggestions??? Thanks

There is no antifreeze in the system. The system is filled with liquid gas and gaseous gas. On the heating cycle, the inside coils should get hot and the outside coils should get cold. In the summer, the heat pump reverses to provide Air Conditioning, the outside coils get hot and the inside coils get cold. They shouldn't really ice up because there is a defrost cycle. You need professional service by an Intertherm technician.

You should always include model number in requests. More info is better. In general, there is a setting for Heat and cold on cheaper thermostats. Mine is like that. It works for heating in winter and you must switch it to "cool" for summer. I assume you do have an AC unit for summer. Who wired it up? was it ever working? Did it get installed during winter? The wiring may be wrong, there are a lot of possible ways to wire. If you are not good at that (and why would you be here if you were?) better get a tech to check it out. In the old days, Edison might send out a tech for free to advise (not fix) if there is a possibility of short (dangerous).

Doesn't matter how hot it was when installed, there still should have been proper start up performed. That means running unit thru all cycles and checking charge. If it was installed this summer then installer should warranty service to return and complete install properly.

what it sounds like happening is the unit is realizing it is falling behind most thermostat s have a 3 degree deadband if they fall 3 degrees or more at a time after running for so long then it will bring on the emergency heat which is located in your inside unit... when it gets really colds and you see this you need to go outside and look is the outside unit still running and is it freezing up on you...also if running check the larger of two pipes make sure the large pipe is hot to touch...based on the description you have given the thermostat is calling for emergency heat but for some reason is not bringing it on or there is a problem with the emergency heat.... hope this helps out some
repost with any additional questions...

is it a heat pump? I would be suspect of the line voltage transformer have 24v. if transformer is not matched to line voltage you can have erratic problems their is an under lying problem. that is being missed find a good contractor . Tom

It is possible that it's the thermostat. When you turn it into cool mode, does the unit come on at all or is it silent? If nothing is coming on, then it's likely it's the tstat. Did the tech check the refrigerant charge while he was there? He should have checked it with the auxillary heat off and the unit just in heat mode. Make sure that the condenser unit outside is coming on when you are calling for cool, If you turn it on and everything comes on, go outside and put your hand on the large copper pipe coming into the unit. In cool mode, this pipe will be cold to the touch and in heat mode, the pipe will be warm to the touch. There isn't much you can do on your own with the exception of changing the tstat. If you can answer some of the questions I have posed, I can try and give you some more answers. Just remember that a check up doesn't mean its a guarantee that something won't happen the next day, it's just that everything was in working order at the time of the checkup.

is the system zoned? if so maybe the zoning control board to the damper motor is wired improperly. when a system freezez its because of 1- restricted air flow across coil, (maybe dirty filter) or 2-low refrigerant charge. again could depend on how its zoned.

Set thr thermostat to AC instead of HEAT.

If your unit is blowing heat inside and it's not a heat pump. It will be most likely electric heat in your case.
Sounds like you have a split unit meaning the condenser is outside and the cooling and the heat features are inside or under your home.If your Rudd is a heat-pump the outside unit will cycle/blow cold air outside in winter and hot air will cycle/blow outside during the summer season. Now, if for some reason the heat  is not coming on inside the house, would be the only reason that you would need to be concerned. Being a heat relay or breaker of could cause that problem. Hope this helps you, Sea Breeze