I have a carrier heat pump model # 38RQ034300 I need instructions for. To maintenance and use thermostst correctly

Carrier says they carry them on their website. Really though, you need a qualified engineer with gauges and refrigerant gas. There isn't much you can do yourself.

https://www.google.com/search?q=Carrier+Heat+Pump+Model+25HBC+service+manual

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Unplug it and do a continued check between the prong,

Does the motor for the pump turn?

All Carrier has on this is installation instructions & field wiring. If your heat pump is freezing up, then check your defrost board to see if the timing jumper for checking the freezestat is set to 30,60, or 90 minutes. If it is set to 90, then set it either to 30 or 60 for the board to check the freezestat more often to go into defrost. Then again, the system could be a little low on refrigerant.

you likely have a "two stage" system, but not a two stage heat pump. the first stage is probably the heat pump itself, and the second stage is the auxilliary resistance heat that suppliments the heat pump at lower temps. if i knew the terminals that are available on the new stat, i could advise you on the proper wiring.

heat rises can be a number of things,, is anything blocking the air flow through the radiator, are the cells in the radiator blocked or clogged,, look in through the cap refill for the radiator and see if its rusty if so flush the radiator, is the thermostat the recommended heat range for the motor? Is the fan working correctly,, any of these could cause your problem, once it reaches the correct heat range is the thermostat opening and the temp0 drops,, and here's one that I have to add , but no reflection on your repair abilities, But I've done it ,, so I know it happens,, is the thermostat put in the right direction, make sure the spring section is towards the motor

hi

have you looked at this it is not the same model but it may help(click on video tab)
http://www.infantino.com/product.cfm?product_id=1192#

i will keep looking for instruction for you

Here you go........... Please let us know if this helped. Good Luck!

http://docs.google.com/viewer?a=v&q=cache:hgFL7TiRe6wJ:www.docs.hvacpartners.com/idc/groups/public/documents/techlit/50zh-07si.pdf+Carrier+50ZH+pdf&hl=en&gl=us&pid=bl&srcid=ADGEESipu-m833kZfEVaQJmsWYvqmUq_PrshZKF4jVMk1H1pOFCmLYzS9dyqpbA4gui4l1SG9-1hRheueTqEyNQRz4J2kuF9359qhNOHTRiPJVP2EAcAD4d30Vr3lurfYxZl4fvbiJmO&sig=AHIEtbRDeqZz8eFHodZtwqt2mMY08y8QNQ

A basic model heat pump with an air handler with electric strip heat generally will continue to run with a call for heat regardless of the outdoor air temperature unless there was an outdoor thermostat (an accessory) installed. There is still heat in the outdoor even at temperatures of zero and below. Generally, there is a balance point of approx 30-35degF that allows the heat pump to heat your house to 68degF without the need for the electric heaters. Below that, the heat pump can still extract heat from outside and "pump" it into your house; however, it will need help from the electric heaters. In temperatures below the balance point, the heat pump will run non-stop. As the temperature in the house falls approx 1 - 2 degF below the setpoint, the electric heaters will energize. So it is not uncommon for the system to run non-stop with the temperature falling a few degrees below setpoint. The colder the outside temperature, the more often the strip heaters will cycle on/off. If your system is well-maintained and operating at proper performance, it is still cheaper to run your heat pump than it is to run on straight electric heat. If you live in a climate where below zero temperatures are normal during the winter months, you might want to research heat pump options that offer higher COP's and increased performance in colder temperature than the basic contractor's model. Start with initiating communication with a local contractor. You will need to consider initial cost and the pay-back period based on your local energy costs and your specific demands you want your system to meet.

Hope this helps!

Most PTAC's have a reset on the power cord where the plug is. If this doesn't help I can find out. The new boards are a little tricky. Is this model touch pad or knobs?