Replace worn parts and ware to find them

There is some truth to it. Refrigerant needs to flow from high pressure to low pressure, and refrigerant pressure is directly proportional to temperature. Once the temperature drops below 40*F, for the outdoor coil, refrigeration efficiency is lost. Some heatpump units need auxiliary heat because.
Cold refrigerant condenses, into a liquid, and a compressor will not compress liquid, why its valves and internals would chatter into pieces. There is such thing as compressor crank case heaters, or belly band heaters. A heater removes, evaporates liquid refrigerant from within a compressor, it is protection.

I would get a compressor heater, wraps around the compressor belly, near 50 watts, and can use a relay to switch off the heater when the compressor runs, or let the heater work continuously.

engine mounting?

Try cleaning the flame sencor , check pilot is clean , check the tubes on the pressure switch are not split and are tight , there are high and low limit switches on there try jumping them out one at a time , see if any of this helps .

This is a waring that your brakes have worn out and need replacement. After replacing from your mechanics shop or garage, ensure that they reset the computer to re-detect the new installed brakes.

If the gas valve is chattering it is probably the coil on the valve. You can obtain a ohm reading on the valve and see if you have high resistance with a multimeter. Also check to see if your getting at least 22 volts across the coil should be terminals mv and c on the valve or sometimes there is just a 2 wire plug going to the valve. I think the coil on the vavle is faulty from the info you have given. Feel the black or silver coil on the valve and see if its getting really hot to touch. I would replace the valve

try jumping out the pressure switch see if it lights , or first unplug heater and replug in might reset or it could need a clean

The chattering is exactly what happens when a relay fails. If this is an older model tub, it is likely that you can just replace the ice cube relay. If it is a newer tub, the relay is most likely imprinted into the main cpu board, in which case you have to have somebody put a new relay on the board for you, or replace the control board. If this is an older tub and you need help sourcing parts, you can contact me @
[email protected]

Worn valve lifter, or the rocker arm needs to be tightened a little.
Have to remove valve covers to see if one is loose.
If it is the lifter, the whole top part of the engine has to be taken off to get at it.

Hi,

Here are a couple of tips that I wrote that tell you how to troubleshoot a Torpedo or Reddy heater...

Reddy Heater - Troubleshooting Torpedo Heaters

Torpedo Heater Pump Pressure Adjustment

heatman101

,.,.,.,.,.,.,.,.,.,.,.,.,.,.

Tcarrigan,

Heater contactors "buzzing": Do you mean normal buzzing or extra loud buzzing? Loud buzzing or chattering can be caused by low voltage to a contactor. If normal sounds, then probably the relays on the contactors is working, but the contacts may be stuck, or burned enough so as not to make contact. First, get a voltmeter and check for 240 volts AC at the heater contactor terminals. If the voltage is low, most likely you need to check the contactors further. Check for dirty contacts, clean if needed. If the contacts are not moving when energized, then you will probably need to replace one or both of the contactors.