20 Most Recent Intertherm P3RA-048K Air Conditioner Questions & Answers

The little black box is a relay. The wires being melted means ,of course, that the contacts inside the box are pitted or corroded. You really should call a reputable repair man.

Sounds like the thermocouple has gone which can happen any time nothing to do with reg change But I would check that pilot is not blocked causing a short pilot .

Sounds like a problem with the circuit board.

it is on return air side of coil.

truck relay

change fan motor capacitor. the other issue could be low gas pressure. mine acted that way when i was running low on propane.

going out on high limit which requires manual reset

change capacitors on unit

Tom P's answer is generally correct: The motor start capacitor is usually not the problem. However, in some cases, particularly on older furnaces, where there were capacitors of certain make and production run will prematurely fail. This happened in March on a mobile home HVAC unit where both the blower fan and condenser fan motor capacitors failed open circuit. Both caps were of the same Mfg, and production lot. Here is a suggestion (for you or an electrically inclined friend): Locate a substitute motor capacitor having similar Mfd (or MF) and Voltage ratings. Remove power from the unit. Reach into the blower squirrel cage and spin it to verify that the shaft is not frozen. Pull the wires from the existing capacitor noting color and location. Connect the wires to the substitute capacitor and secure it place. Apply power and turn on the blower. A no start? Motor replacement time.

why did the wiring burn?Id have the heat exchanger inspected before rewiring.better to be safe.

Shut off power, get a small wrench, remove orifice spuds and clean them with toothpick. Take burners out and clean rust from them. Check and see if you are getting 24 volts to gas valve. If not replace it.

You may have a problem with a temperature safety system.  Before changing anything else, check to see if the unit is clean!!!  Dirt/dust can fool the safety system into an overtemperature status.  Inspect the heat coils for damage and dirt.  Gently clean.  

HEY< this sounds like an electric furnace and some heating elements are not working! WHY! Just call 918-6878813 and see if KOOL BREEZES cAN HELP!

Do you know if your unit is a heat pump or not? Sounds like it may be an electrical problem and yes you would need to call a service tech.

at night disconnect power use flash light and mirror check to see if coil is stopped up if unit is up flow coil fan heat kit make sure there is a trap in the drain line or unit will pull air into system most likley cause is dirty coil hope this helps unit could also have dirty fan blades low air flow or starting to freeze the coil due to low freeon charge if down flow supply duct under unit ths is not good due to heat kit on bottom of unit can get wet! hope this helps with your problem

you need to contact your nearest a/c supply house. most company's that sale parts on line will not sale gas valves to the public due to liability.

Hello, this sounds like a faulty capacitor. Replace capacitor to the motor.

the blower on my furnace keeps going on and off when i turn the furnace on .ichanged the snapdiscs no change changed thermocoupler and therostat still no change whats my problem

Make sure the gas valve is turned to the ON position after you had it in PILOT position. Also check the thermostat low voltage wiring @ furnace...jumper the Red & White wires to bypass the thermostat temporarily. Make sure there is 24 volts on you low voltage circuit.